Chilled plunge tub
BlueCube C1 Cold Plunge Tub
60-inch Standard, Black cladding
$16,500US price, checkedHandbuilt stainless sit-in tub that both chills and heats, 41–104°F
Check price at BlueCube for BlueCube C1 Cold Plunge Tub Full review →SIDE BY SIDE
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See prices, running costs, specifications and trade-offs side by side. Choose two to four products of the same type.
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Our hot-and-cold pick
Renu Therapy Cold Stoic 3.0
Meterous Black finish, California Redwood deck, included basic tub lid (SKU AS-CS30-BK-RD)
$11,399US price, checkedHot-and-cold plunge tub, 37 to 104°F, with published power use
Check price at Renu Therapy for Renu Therapy Cold Stoic 3.0 Full review →| Criterion | BlueCube C1 Cold Plunge Tub | Renu Therapy Cold Stoic 3.0 |
|---|---|---|
| US price | $16,500Checked Oct 13, 2026 · Price details in the review | $11,399Checked Oct 13, 2026 · Price details in the review |
| Three-year ownership estimate | $16,500 Incomplete known subtotal. Not included: installation, annual consumables, other annual costs, energy use. | $12,013.95 Incomplete known subtotal. Electricity assumption: $0.18/kWh. Not included: installation, annual consumables, other annual costs. |
| Choose if | You want one stainless tub for cold plunges and warm soaks, indoors or out, and you have a free 120 V, 20 A circuit and a way to move a freight delivery from the curb. | You want cold plunges and warm soaks at home from one tub, you can give it a dedicated 120 V circuit, and you can handle curbside delivery of a 365 lb tub. |
| Main trade-off | You pay $16,500 without a published footprint, water volume, weight or running cost, and changing your mind costs a minimum 25% restocking fee plus shipping. | The chiller gets only 1 year of coverage (other covered components get 5 years), returns cost 5% plus shipping, and a fresh fill cools slowly at the manual's rate. |
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| Exact variant | 60-inch Standard, Black cladding | Meterous Black finish, California Redwood deck, included basic tub lid (SKU AS-CS30-BK-RD) |
| Dimensions | It's sold as a 60-inch sit-in tub with full-body immersion up to the neck. The interior is contoured at a 20° slope. The product page names 54-inch Mini and 60-inch Standard sizes, but the online store lists only the 60 size. BlueCube doesn't state exterior or interior dimensions, water capacity, or empty and filled weight on the pages reviewed. | The body measures 70 L × 33 W × 35 H in. It's 33 in wide at the base and top and about 35.5 in at the widest point of the contoured sides. The tub interior is 40 L × 25 W × 31 D in. The tub weighs 365 lb dry and about 1,155 lb filled with 95 gallons. The user manual gives about 1,165 lb filled. The cut sheet asks for 15 in of clearance at the small vent and 27 in at the large vent. It also asks for 1 to 2 in on the long side for the cord. |
| Installation | It needs a dedicated 120 V, 20 A outlet, and a GFCI cord is included. You can hardwire the tub instead. BlueCube rates it for indoor and outdoor use and says the chiller operates down to 20°F ambient. Delivery is free curbside freight in the continental US, not in-home placement. BlueCube doesn't state plumbing, drain, floor-load or clearance requirements on the pages reviewed. | Renu recommends a dedicated 120 V, 15 A circuit. The user manual adds that the circuit shouldn't be shared with other devices and calls for grounded 110 V/120 V power. The unit has a GFCI plug. The product page lists a 12 ft cord, but the cut sheet shows both a 12 ft GFCI cord and a 9 ft standard 3-prong cord. No plumbing connection is described. The manual says to fill the tub with a hose to 6 to 8 in below the top and to place it on a level surface in a water-resistant area. It doesn't give a floor-load rating, and the filled tub weighs about 1,155 lb. Delivery is free curbside within the contiguous US, and you have to move the tub off the pallet yourself. It ships in 3 to 5 weeks. |
| Materials | The tub is 14-gauge marine-grade 316-L stainless steel with a contoured sit-in interior. It sits in a marine-grade plywood cabinet coated in Line-X polyurea, which BlueCube says adds UV resistance and insulation. Black is the cladding priced here, and white, grey, beige and uncladded cost the same. BlueCube also offers any Sherwin-Williams custom color, but the online store doesn't list a price for it. BlueCube's performance page says its plumbing is Schedule 40 PVC. That's a brand-wide statement, not a C1 spec. An insulated spa cover with child locks is included. | Renu doesn't state the shell material, though its warranty page groups the Cold Stoic 3.0 with its plastic tubs. The perimeter has 4 in of HD foam insulation. The version priced here has a California Redwood breath deck, and Pacific Cedar and four composite decks are options. Renu also lists a basic tub lid and a matching step stool, and says the tub is handcrafted in Southern California. |
| Warranty | Full coverage (parts and labor) runs 3 years for residential use or 1 year for commercial use. The stainless tub and frame are covered for 15 years. Exclusions and the claim process weren't reviewed. | Covered components get a 5-year limited warranty from the delivery date. The water chiller is the exception, at 1 year. The user manual dates coverage from shipment instead. You can add a 4-year extended chiller warranty, for 5 years in total, if you buy it within 364 days of shipment. Its price isn't stated. Coverage is for non-commercial home use in the contiguous US by the original purchaser. Exclusions include water leaks, poor water chemistry, neglected filter care, freezing conditions, power outages, low water flow and misuse. Renu also takes no responsibility for the natural wood of Redwood and Cedar decks. The user manual says the warranty doesn't cover the water filter or the filter housing O-ring. You do most repairs or part replacements yourself. Renu covers parts for covered repairs, and you pay shipping and removal costs. Renu pays approved-provider labor at up to $50 per hour, for a maximum of 2 hours. Rural travel fees aren't covered. |
| Returns | Standard models have a 30-day money-back policy with a minimum 25% restocking fee. Under the refund policy, you must request a return within 30 days of receipt, and the unit must be unused and in its original packaging. Refunds are paid net of the 25% restocking fee and shipping expenses. Custom builds can't be returned. On a $16,500 tub, the fee alone is at least $4,125. | You can return a new cold plunge from a domestic order for any reason within 45 days of delivery. It has to arrive back in good condition, and you pay a 5% restocking fee and shipping costs. Refunds process 3 to 10 business days after receipt. Canceling before shipment costs 5%, and shipped orders can't be canceled. Refurbished, international and bulk (3 or more units) sales are final. |
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These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.