Cold plunges

Stainless steel or wood where the water sits. The chillers, pumps, hoses, covers and insulation around them are still plastic and electronics. 7 picks, prices as of Nov 5, 2026.

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Before you buy

Cold water does not sanitize itself and needs filtration plus a sanitizer. Some tubs sanitize with ozone, which is a lung irritant, so ventilate. Stainless hard tubs are easier to keep clean than inflatable PVC tubs, whose seams and liners are hard to disinfect (NCCEH, 2024). Some “stainless” plunges still have plastic interiors and some wood tubs hide a plastic liner, so each card names what the water touches. Cold plunging carries cardiac and blood-pressure risk: never plunge alone or after alcohol, keep sessions short, and check with a doctor if you have a heart condition. Source: ncceh.ca.

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