Renu Therapy Cold Tub Review (Cold Stoic Classic + 2.0)

by Global Viewpoint
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Looking for a cold plunge with a high-quality design and luxury features? Renu Therapy’s Cold Stoic is a great option for health and wellness enthusiasts. As someone who’s personally tried over 20 brands of cold plunges, I’m here to give you the lowdown on why the Cold Stoic Tub might just be the game-changer you’ve been looking for.

From pro athletes and Hollywood celebrities to everyday folks like you and me, everyone is getting into cold water immersion (CWI) these days. It’s not hard to see why. Ice baths are a great, all-natural method to optimize health and performance. It helps you burn fat, relieve inflammation, soothe muscle aches and pains, increase blood circulation, and even boost your immune system.

If you’re looking to take the plunge and discover the many benefits of cold water immersion for yourself, it can be hard to know which cold tub products are right for you. Would you be best served by a lower-cost basic barrel-style cold plunge? Or do you prefer something with a more well-rounded set of features? Should you go iceless? There are a lot of questions to ask yourself.

To help you find the best ice bath that will meet your needs, I’ve reviewed many of the best cold plunge tubs on the market today. Today, I’m thrilled to take a deep dive into the Cold Stoic from Renu Therapy. This includes both the Cold Stoic Classic and the Cold Stoic 2.0. Let’s get started!

Looking to purchase the Cold Stoic? Check out my referral link to save $250 when you order!

An ice bath enthusiast using the Cold Stoic outside during winter

A quick look at the Cold Stoic by Renu Therapy

As one of the leading names in alternating cold-hot therapy products, Renu Therapy offers a wide range of ice bath tubs, hot soak tubs, and indoor and outdoor saunas. Renu Therapy is one of the most trusted high-end brands operating in the cold tub space, and the Cold Stoic is their flagship model. It provides a premium ice bath experience for those who are already fully invested in the cold plunge lifestyle.

The Cold Stoic acts as Renu Therapy’s base-model cold plunge tub, with the Cold Stoic 2.0 being a slightly pricier upgrade boasting enhanced features. For those who need a little extra room, Renu Therapy also offers the extra-large Siberian Cold Plunge. Last but not least, for cold plungers on the go, there’s the convenient and portable Traveling Stoic.

The standard-size Cold Stoic can accommodate customers up to 6’55” and/or 255 lbs. It uses a programmable thermostat and an ultra-efficient integrated chiller capable of lowering water temperature down to 36F. This eliminates the need to buy and manually fill your cold tub with ice, while giving you greater control over your ice bath experience.

The Cold Stoic combines luxury form with superior functionality

Ready to take The Plunge? The Cold Stoic is available in five body colors: black, white, light gray, dark gray, and navy blue. Customers also have a choice of four different wood types for the tank’s breath-deck top: California Redwood, Pacific Cedar, Dark Burn, and Tiger Stripe. The redwood and cedar options are treated with tung oil and finished with beeswax, and the Dark Burn and Tiger Stripe options are finished using a centuries-old Japanese waterproofing technique called Shou Sugi Ban.

Another premium feature that differentiates the Cold Stoic is its advanced filtration and ozone purification system. This 4-part purification system is all-natural, using only energetic oxygen with no chemicals needed. With help from a 10-inch filter system, surface dirt/oil-removing buoy, and a sanitizing mineral stick that uses silver ions to destroy bacteria and algae, the Cold Stoic stays clean and helps conserve water by reducing the need for you to empty and refill it.

Last but not least, 80% of the Cold Stoic’s components are American-made. And the Cold Stoic itself is 100% assembled in the USA. This sets it apart from many of its competitors, who make heavy use of components imported from foreign manufacturers.

A Renu Therapy customer taking an ice bath in the Cold Stoic tub
The Cold Stoic’s deluxe features set it apart from other iceless cold plunges.

Renu Therapy cold tubs at a glance

Renu Therapy was founded in 2020 by entrepreneur Bill Bachand. Inspired by the writing of Guinness World Record holder Wim Hof (AKA The Iceman), Bachand turned to cold plunging to treat his joint and muscle pain. The experience gave Bachand a renewed sense of vitality and energy. He started the California-based company Renu Therapy with the express goal of sharing that experience with others.

After much research and DIY experimentation, Bachand made it his mission to create a premium-quality cold tub offering superior reliability, durability, construction, and design. Today, Renu Therapy is one of the top names in cold plunge technology and contrast therapy. Celebrity customers include actor-comedian Rainn Wilson, Miami Heat player Dwayne Dedmon, and country music star Brett Eldredge.

A Cold Stoic tub installed outside next to an outdoor sauna
Before you cold plunge, try warming up in a sauna to take full advantage of the benefits of contrast therapy.

What sets Renu Therapy apart from other cold plunge manufacturers?

Getting started with cold water immersion therapy doesn’t take much. For a beginner, all you really need is a tub or barrel, some cold water, and plenty of ice. That’s more than enough to help a novice get a sense of whether cold plunging is right for them. However, once you’ve decided to make cold plunging a regular part of your exercise and recovery routine, you’ll need to upgrade to a permanent, freestanding ice bath.

Continuing to cold plunge using the beginner’s DIY method is neither efficient nor effective. Let’s face it; large garbage cans and barrels are not made for cold plunging, and they’re not exactly dignified. They’re not designed to keep the water cold for very long, they don’t provide much in the way of physical comfort, and they’re prone to springing leaks.

Renu Therapy helps you take your cold plunge game to the next level

On a similar note, buying bags of ice to keep your tub, can, or barrel cold can be a real hassle. Worse, it can get very expensive very fast, costing around $40 per session. By contrast, an iceless cold water therapy tub like the Cold Stoic may cost more upfront, but it pays for itself over time. You don’t have to worry about carrying heavy bags of ice or patching holes.

You don’t have to worry about looking silly sitting around in a giant garbage can, either. The main thing that differentiates Renu Therapy from other cold tub manufacturers is its commitment to premium quality, high-end luxury features, and elegant design. With its authentic wood breath-deck top, the Cold Stoic looks better than any other ice bath on the market. As a brand, Renu Therapy communicates class and style just as much as it promotes health and wellness.

Ready to take a closer look at the Cold Stoic? Here’s what you need to know about this top-of-the-line cold immersion tub.

Highlights of using the Cold Stoic

With the Cold Stoic, Renu Therapy promises a deluxe cold therapy experience. Does it deliver? To say it met my expectations is an understatement; the Cold Stoic actually exceeded them! This tub is as comfortable, accessible, and low-maintenance as it is attractive. And it is very, very attractive.

When using the Cold Stoic ice bath for recovery, the roomy tank, integrated chiller, and advanced filtration system really help to elevate the experience. You don’t have to worry about fiddling with an inexact thermostat or changing dirty water all the time. In turn, you’re able to fully appreciate the effects of your cold plunge: the soothing of your sore muscles, the stimulation of your circulatory system, the relief from your daily stress and anxiety, etc.

The Cold Stoic tub seamlessly blends convenience, functionality, and luxury together in one package. In doing so, Renu Therapy has made enjoying the benefits of cold water immersion easier than ever before.

The Cold Stoic tub with matching step stool and insulated lid
The Cold Stoic tub offers superior functionality alongside a sleek, modern appearance.

Here are some features and qualities of the Cold Stoic that I found the most interesting:

– The Cold Stoic’s breath deck can be customized with four different wooden top options: redwood, cedar, Dark Burn, and Tiger Stripe. Of these, Dark Burn and Tiger Stripe are especially noteworthy because they are waterproofed using an ancient Japanese technique called Shou Sugi Ban. This technique involves careful selecting virgin wood, then cutting it into planks, drying it in the sun, charring with a flame, and finally sealing with oil. The result of this process is a distinctive look and an extended lifespan.

– Unlike most ice baths currently available on the market, the Cold Stoic tub does not use chemicals for cleaning. Instead, Renu Therapy’s all-natural 4-part purification system utilizes ozone (or energetic oxygen) as a powerful oxider. This, plus a 10” filter system, dirt/oil-removing buoy, and sanitizing mineral stick, allows the water in your Cold Stoic to stay cleaner longer. All this, without the need for expensive synthetic chemicals.

– Being an iceless cold plunge, the Cold Stoic tub comes with its own high-powered water chiller. This eliminates the need to constantly replenish your tub with ice, and also allows you to precisely control the water temperature. The thermostat adjusts to any temperature between 39F and 55F, and will maintain it consistently once the desired temperate is reached. Also of note is the fact that the chiller is integrated into the tub’s body, reducing clutter and contributing to the Cold Stoic’s overall sleeker appearance.

Looking to purchase the Cold Stoic? Check out my referral link to save $250!

A view of a swimming pool from a Cold Stoic tub installed on an outdoor patio
Renu Therapy’s Cold Stoic tubs is designed to be used both indoors and outdoors.

The Cold Stoic Classic vs. the Cold Stoic 2.0

These are the two most popular cold plunges that Renu sells. They are similar in their overall design, price, and shipping times. However, there are some notable differences between the two to consider:

  1. Design & Material:
    • Cold Stoic 2.0: Upgraded with a “Thermal Insulation System” and contoured side panels, similar to a high-end cooler. It has super tough, weather-proof plastic construction.
    • Cold Stoic Classic: Constructed with weather-treated wood panels.
  2. Size & Capacity:
    • Cold Stoic 2.0: Larger tank size, suited for most customers up to 6’7” and/or 275 lbs. Exterior Dimensions: 70”x33”x35”; Tank Dimensions: 40”x25”x31”.
    • Cold Stoic Classic: Suited for most customers up to 6’5” and/or 255 lbs. Exterior Dimensions: 64”x33”x34.25”; Tank Dimensions: 36”x24”x30”.
  3. Color Options:
    • Cold Stoic 2.0: Offers 6 different base colors.
    • Cold Stoic Classic: Comes with a choice of 5 body colors.
  4. Lid:
    • Cold Stoic 2.0: Features an upgraded quick access lid.
    • Cold Stoic Classic: Comes with an insulated cover.
  5. Warranty:
    • Cold Stoic 2.0: 5-Year Limited Warranty.
    • Cold Stoic Classic: 1-Year Limited Warranty.

In all, while both the Cold Stoic Classic and Cold Stoic 2.0 are designed for effective cold water therapy, the Cold Stoic 2.0 offers enhanced features. This includes better insulation, a more durable build, and a larger size, catering to a broader range of users. The Cold Stoic Classic, on the other hand, offers a more traditional design with its wood construction and is slightly smaller in size.

Who should buy the Cold Stoic?

– People who are very well experienced in cold water therapy tried cold water therapy and want to make CWI a major part of their ongoing exercise and recovery routine

– Cold water therapy enthusiasts who are looking for a higher-quality ice-bath tub complete with fully integrated premium features and a sleek, tasteful design 

– High-performance athletes and young professionals who need the kind of physical recovery benefits that ice baths provide, such as an improved immune system, relief from muscle pain and inflammation, weight loss, and more

– Anyone who wants to buy a 100% handmade-in-the-USA product that is customizable to their unique specifications

– Gyms and wellness center owners interested in offering cold plunges to customers

– Retreat hosts and event organizers searching for a reliable high-end cold tub

– Anyone who wants to be more proactive about taking care of their health and wellness

A newly installed Cold Stoic tub beside an outdoor swimming pool
Cold plunging has numerous health benefits, including improved circulation, weight loss, and joint pain relief.

Who shouldn’t get the Cold Stoic?

– Those who are still new to cold water immersion and haven’t fully committed to making ice baths a regular part of their health and wellness routine

– Anyone who is specifically looking for a portable ice bath should consider purchasing Renu Therapy’s Traveling Stoic instead

– Cold plungers who are more than 6’7” tall and/or 275 lbs. or more would be better served by the new Cold Stoic 2.0, while those that are more than 6’8” tall and/or 290 lbs. are better accommodated by the Siberian Cold Plunge

– People who can’t afford a high-cost premium ice bath like the Cold Stoic should research more affordable options with fewer features and/or luxury accouterments

In addition to Renu Therapy, here are some of the other tubs I recommend for cold water immersion:

Budget: $Ice Barrel
Mid: $$The Edge Tub
Luxury: $$$BlueCube

My tips for using the Cold Stoic ice bath

1. Use the Cold Stoic in conjunction with a sauna or hot soak: As a company, Renu Therapy is a big proponent not just of cold water therapy, but of contrast therapy. Contrast therapy utilizes alternating cold and hot temperatures to supercharge the recovery process. If you want to get the most out of your Cold Stoic tub, I recommend taking a long soak in a hot bath or sauna before you plunge.

2. Pick the right spot for your ice bath installation: The Cold Stoic is designed to be used in both indoor and outdoor environments. However, it’s worth noting that it does require access to an electrical outlet. The included eight-foot power cord offers plenty of wiggle room, but it’s important to plan ahead to find a spot that offers comfort, privacy, and functionality.

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3. Get the Total Protective Cover to shield your ice bath from the elements: The Cold Stoic is designed to be used both indoors and outdoors, with sturdy construction and superior weatherproofing. It also comes with its own insulated lid, which helps protect your investment. However, to ensure a higher level of protection, I recommend buying the Renu Therapy Total Protective Cover. This waterproof vinyl-coated polyester cover is resistant to rips, tears, abrasions, and punctures, and comes with a portable bag for easy storage and transport.

A woman taking an ice bath in a Cold Stoic tub from Renu Therapy
Able to reach temperatures as low as 39F, the Cold Stoic provides an exhilarating ice bath experience.

Other things to consider before buying the Cold Stoic

In addition to the information above, here are some other important things to keep in mind if you’re thinking about getting Renu Therapy’s Cold Stoic cold water immersion tub:

What comes with the Cold Stoic cold tub?

The base price for the Cold Stoic includes the following:

– Cold Stoic Standard Tank

– Ultra-Efficient, Integrated Chiller

– Advanced Filtration and Ozone Purification System

– Matching Step Stool

– Insulated Lid

How long does it take to set up?

Setting up your Cold Stoic iceless tub is relatively easy, usually taking around 10-20 minutes. After removing the insulated lid that comes with the tub, you’ll start by opening the maintenance bay door. Then open up the valves and tighten the unions. Finally, you’ll want to attach the water chiller by connecting the in and out hoses to the corresponding ports.

Renu Therapy makes installation easy by clearly labeling everything and including a manual, as well as two different-sized wrenches. No other directions or tools are needed. Once your tub is filled with water, plug the Cold Stoic in using the included eight-foot cord. Once the water is cooled, immerse yourself in a one-of-a-kind luxury ice bath experience.

Warranties and guarantees

Renu Therapy offers customers a 5-year limited warranty on all cold tub products, including the Cold Stoic. However, this warranty only applies to non-commercial, in-home, or residential use. While the warranty covers defects and malfunctions that arise during normal use conditions, it does not cover damage due to poor water chemistry, neglected filter care, freezing conditions, power outages, lack of attention to low water flow, or any other form of neglect, misuse, or abuse.

All components of the Cold Stoic covered under this warranty are warrantied for a period of 5 years from the date of delivery, except for the water chiller, which is warrantied for a period of 1 year from the date of delivery. An extended warranty for the water chiller is available for purchase directly from Renu Therapy.

How cold does the Renu cold plunge get?

Renu’s cold tubs can be set as low as 36º F (2.2°C). This is an improvement from the previous chilling unit, which had a minimum temperature of 37º F (2.8°C).

Where to buy the Cold Stoic

You can buy the Cold Stoic tub and other contrast therapy products directly through the Renu Therapy cold tub website. Renu Therapy also sells a variety of maintenance items and accessories, such as protective covers, replacement filters, sanitizing spa sticks, and more.

What are the benefits of Renu therapy?

I’ve got to tell you, diving into Renu Therapy’s cold plunge tanks is a game-changer for your body and mind. Imagine easing those aching muscles after a tough workout; that’s the kind of muscle recovery boost we’re talking about here. And it’s not just about soothing soreness. It’s about kickstarting your circulation, getting that blood flowing in a way that just invigorates your whole system.

But wait, there’s more! Regular plunges can actually dial down inflammation, which is a big win if you’re dealing with chronic pain or just trying to keep those joints happy. And if you’re like me, always looking for ways to beef up your immune system, you’ll love how this cold water challenge can give your immunity a solid boost.

Now, let’s talk about the mental game. Stepping into that cold water takes grit, but boy, does it build mental resilience. It’s like a workout for your willpower, and the endorphin rush afterward? Absolutely exhilarating. Plus, who wouldn’t want better sleep? I’ve found that a regular cold plunge routine helps me hit the pillow and just drift off into deeper, more restful sleep.

And hey, let’s not forget about the skin and hair perks. Cold water has this amazing way of tightening up pores and giving your hair that healthy shine. So, not only are you feeling great, but you’re looking pretty fantastic too. Just remember, though, cold therapy isn’t a one-size-fits-all deal. But for me, and many others, it’s been a total wellness win!

Luxurious cold spa
For those that can’t afford a built-in cold spa like this, Renu is the next best thing.

Renu Therapy: Ice bath specifications

Looking for some technical details about the Cold Stoic cold therapy tub from Renu Therapy? Here are some product specifications collected together in one spot for easy reference:

Exterior Dimensions:64” x 33” x 34.25″
Tank Dimensions:36″ x 24″ x 30″
Dry Weight:375 lbs.
Filled Weight (w/ 80 Gallons):1,050 lbs.
Temperature Range:39°F – 55°F
Water Chiller Horsepower:1/4 HP
Energy Use: 350-500 watts @ 3-5 amps

With its top-of-the-line construction and premium features, the Cold Stoic offers an unforgettable CWI experience making it one of the best cold plunge products on the market in 2024.

My final thoughts on the Cold Stoic from Renu Therapy

Of all the ice bath products I’ve reviewed to date, the Cold Stoic tub ranks high among the most impressive. The all-natural 4-part filtration system is effective at keeping the tank cleaner for longer. That means the need to change water frequently is greatly reduced.

Additionally, the integrated chiller unit cools water fairly quickly and has no trouble maintaining a precise temperature. Turning the thermostat all the way down to 36F makes for an extremely exhilarating cold plunge experience.

What’s more, the Cold Stoic’s sleek modern aesthetic, wood-topped breath deck, and customizable color schemes help set this product apart from other cold tubs. It doesn’t just feel good using this tub; it looks good, too!

While many cold plunges are strictly utilitarian, Renu Therapy lives up to its reputation for going one step beyond. The Cold Stoic cuts a striking figure in any home gym or bathroom, or on an outdoor deck or patio. You’ll never get tired of showing this one off to your friends.

Is the Cold Stoic worth it?

I get it, cold water immersion isn’t for everyone. Honestly, jumping into cold water isn’t everyone’s idea of fun, right? If you’re still on the fence about it, the Cold Stoic might feel like too much at this stage. But, if you’re one of those brave souls who’ve already fallen in love with the thrill of cold plunging, then this could be a worthwhile investment. And if you’re seriously looking for an iceless tub that’s the real deal, let me tell you, the Cold Stoic is something you’re going to be pretty impressed with.

To reiterate, this is not a CWI product for beginners or casuals. It may also not be ideal if you’re someone who travels and is on the move a lot. This is a luxury item meant for home use. Think of it as a permanent addition to your property, like a jacuzzi, sunroom, or infrared sauna. The $9699 price tag means you’re going to want to use it a lot to get your money’s worth.

Fortunately, the Cold Stoic tub offers an array of customization options. It also includes features including a non-chemical purification system and an ultra-efficient integrated water chiller. As such, I consider it as comfortable and easy to use as possible. In other words, even if it wasn’t a considerable investment, you’d still be eager to use the Cold Stoic over and over again. Think of it as the Rolex or Rolls-Royce of cold tubs. It really is that level of quality.

Renu Therapy – Company contact info

Need to get in touch with the cold water therapy experts at Renu Therapy? Check out their official website or email them at  You can also follow them on Instagram, Facebook, and YouTube!

Looking to purchase the Cold Stoic? Check out my referral link to save $250!

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Immerse yourself in more cold plunge therapy content

I hope you enjoyed reading my review of the Cold Stoic from Renu Therapy. Want to check out more cold immersion content? Read more of my cold therapy blogs using the links below:

15 Best Best Cold Plunge Tubs (Updated for 2024)

Ice Bath Benefits: Research + Tips for Ice Bathing at Home

Wim Hof Ice Bath – Technique, Breathing Method + More

20 Benefits of Cold Water Immersion: Ice Baths, Cold Showers + Plunges

Ice Bath vs. Hot Bath: Pros & Cons of Each

Top 7 Benefits of Cold Showers (Why They Are Good for You)

Ice Bath Recovery: Everything You Need to Know

Cold Water Swimming: Benefits, Tips & More

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