Cold Plunge Chiller Pro, 1/2 HP Drop-in Ice Bath Water Chiller for Any Tub

Why it's worth it

The PlungeFit Cold Plunge Chiller Pro is a half-horsepower unit that drops straight into the water — no hoses, no plumbing, no separate loop. It's rated to 39°F, it's controlled from your phone, and it works with a barrel, a stock tank, or the bathtub in your apartment.

Most chillers ask you to build a small plumbing project: inlet hose, outlet hose, pump, fittings, leaks. This one goes in the water and plugs into an outlet. Owners consistently describe setup as the surprise — box open, unit in, chiller running the same afternoon. If the thing standing between you and a daily plunge is a Saturday of assembly, that difference is the whole reason to pick this.

It untethers you from ice, which is where the math turns. Ice is a recurring cost and a recurring errand, and both scale with how often you actually use the tub. A chiller front-loads the expense and then charges you a modest amount of electricity. If you plunge a few times a week, the running cost lands well under what regular ice runs cost, and you stop scheduling your recovery around the grocery store.

From our review of 3 cold plunge tubs, by Eleanor Vance, Health & Beauty Editor

What we like

• +Most chillers ask you to build a small plumbing project: inlet hose, outlet hose, pump, fittings, leaks
• +It untethers you from ice, which is where the math turns
• +The app is genuinely useful rather than decorative
• +It's also flexible in a way a fixed tub isn't

What to know

• –Water needs to move for a drop-in chiller to work well, and this one doesn't circulate the whole tub on its own
• –The thermostat has a wide swing
• –This is a young product from a small brand, and the owner feedback pool is thin