2 Pack Bath Thermometer for Bathtub, Rechargeable Waterproof Floating Water Thermometer for Ice Bath, Pool Review (2026)

What it is

This is a pair of floating water thermometers sold together, designed for use in bathtubs, ice baths, and pools rather than as a single-unit product. Each unit is rechargeable rather than running on disposable coin cell batteries, using a sealed charging port and a rechargeable cell that the listing describes as good for roughly a month of use on a couple of hours of charging. The floating design means the thermometer sits on the surface of the water and gives a reading without needing to be held or dipped repeatedly, which is the standard approach for this category of product. Selling two in one package is the main differentiator here, letting one owner keep a dedicated thermometer in a cold plunge tub and a second in a hot tub, bath, or pool without needing to move a single unit back and forth.

Setup and daily use

Setup is minimal: charge each unit fully before first use, then drop it into the water it will be assigned to. The listing describes the thermometer activating automatically on contact with water and continuing to display a reading for a set period after being removed, which is a common feature in floating thermometers so you can lift it out and still check the number without it going dark instantly. The charging port is sealed to keep water out, which matters since these units spend most of their working life floating on or near liquid, so charging port care is one of the more important maintenance habits with this type of device. Because two units are included, a household can dedicate one to a cold plunge and the other to a bath or hot tub without cross-contaminating water types or having to dry and move a single thermometer between them.

Who it suits

This is a good fit for anyone running more than one type of water-based routine at home, most obviously someone doing both cold plunge sessions and separate hot baths or hot tub soaks, since each water source can get its own dedicated thermometer. It also suits households where more than one person uses water therapy, since two units mean less waiting for a shared thermometer to be available. Because it is rechargeable rather than battery powered, it also suits anyone who would rather avoid buying and replacing small coin cell batteries repeatedly. People who only need a single thermometer for one water source, such as only an ice bath, may find a 2 pack more than they need, though it can still function as a spare.

Where it falls short

There is no integrated timer mentioned in the product description, so anyone trying to time cold plunge or bath sessions to a specific duration will need a separate phone timer, kitchen timer, or dedicated timer product, since this device is reading temperature only. The charging port being exposed to water at all is a design point worth taking seriously, since the seal needs to close properly every time or moisture can get into the charging mechanism and affect the unit over time. As with any small floating accessory, the compact size also makes the units easy to lose track of in murky ice bath water or at the bottom of a larger tub if they happen to sink or get pushed under.

Bottom line for recovery routines

For a household running both cold and hot water therapy, getting two rechargeable thermometers in one purchase is a practical way to avoid moving a single unit back and forth or buying two separate products from different listings. The rechargeable design cuts down on battery replacement, which is a reasonable convenience for something that will be used regularly. Buyers who specifically want built-in session timing should look elsewhere or plan to pair this with a separate timer, since temperature reading is the extent of what these units are built to do.

Frequently asked questions