BlueCube C1 Cold Plunge Tub review

The BlueCube C1 is the entry model in BlueCube's handbuilt stainless steel line, and it has the most heavy-duty spec sheet on this list. BlueCube lists it at $16,500.00 with curbside delivery in the lower 48 states. The 60 in tub is 14-gauge marine-grade 316-L stainless steel with a Line-X exterior, and a 13,600 BTU (1.5 HP+) commercial chiller with a heater covers 41°F to 104°F and keeps working down to 20°F ambient. A ¼ HP Iwaki pump circulates 25.6 GPM, and water is cleaned by 20-micron filtration plus automatic ozone. Cover is strong: 3 years of parts and labor for homes, 1 year for commercial use and 15 years on the tub and frame. Each unit is built to order with an 8 to 10 week wait, needs a dedicated 120V 20A outlet, and the 30-day money-back guarantee carries a minimum 25% restocking fee. Its lowest temperature, 41°F, is also warmer than cheaper tubs here.

Who it is for

buyers who want stainless steel and commercial-grade parts

Price

$16,500 one-time; curbside delivery included in the lower 48.

C1 Cold Plunge Tub Regular price $16,500.00
Quoted from the vendor pricing page on November 14, 2026.

Key features

• Marine-grade 316-L stainless steel tub, 14-gauge
• Temperature range of 41°F to 104°F with chiller and heater
• 13,600 BTU (1.5 HP+) commercial chiller, about 5°F per hour, works down to 20°F ambient
• RiverMode circulation from a ¼ HP Iwaki pump at 25.6 GPM
• 20-micron filtration plus automatic ozone

Strengths and weaknesses

• Strength: 3-year residential parts and labor warranty plus 15-year tub and frame cover
• Strength: Insulated spa cover with child locks and maintenance kit included
• Strength: Head-submersion capable contoured interior
• Weakness: $16,500 is the highest price on this list
• Weakness: Handbuilt to order with an 8 to 10 week build time
• Weakness: Returns carry a minimum 25% restocking fee

Key facts

• Temperature range: 41°F to 104°F
• Tub: 316-L stainless steel
• Chiller: 13,600 BTU (1.5 HP+)
• Warranty: 3 years residential; 15 years tub and frame
• Price: $16,500

Where it ranks

BlueCube C1 Cold Plunge Tub is No. 8 in our Best Cold Plunge Tubs verdict.