Keeping a cold plunge clean, insulated, and easy to access matters as much as the tub itself. These accessories solve different problems — insulation, safety, water quality, maintenance — rather than competing with each other, so most owners add several over time.
We cover insulated lids, filtration and sanitation add-ons, entry steps, and thermometers for home setups, including what to check for fit against your specific tub model. See our Cold Plunge Accessories Buying Guide for the full breakdown.
13 Products in Cold Plunge Accessories Price Any price Under $500 $500–$2,000 $2,000–$5,000 $5,000+
Type Any type Entry Step Ice Insulated Cover Thermometer Tub Covers Water Care
Brand Any brand AquaChek Haldane Ice Barrel Plunge Renu Therapy TempPro
Rating Any rating 4.5+ stars 4+ stars
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Illustrative photo AquaChek
A bottle of 100 test strips that read pH, total and free chlorine, bromine, alkalinity, hardness, and cyanuric acid in 15 seconds.
May suit: Cold plunge and hot tub owners who sanitize with chlorine or bromine
See price on Amazon
Checked Oct 19, 2026
Illustrative photo Haldane
Two silicone molds that freeze 6 lb of ice in large blocks, a home alternative to buying bagged ice for an ice bath.
May suit: Ice bath owners who plunge a few times a week and have freezer space
See price on Amazon
Checked Oct 19, 2026
Illustrative photo Ice Barrel
A 16-inch, roto-molded step stool made from recycled material, built to help with entry and exit from an ice barrel.
Placement Indoor or outdoor May suit: Ice Barrel owners wanting safer, easier entry and exit
See price on Amazon
Checked Sep 8, 2026
Illustrative photo Ice Barrel
A shatter-resistant sink-or-float thermometer with a large dual Fahrenheit/Celsius display, for checking actual water temperature before a session.
May suit: Anyone who plunges without a chiller and needs to check actual ice/water temperature
$18 list price
Checked Sep 12, 2026
Illustrative photo Plunge
A 6-pack of official replacement filters for Plunge's All-In and Pro Chiller systems, also available in 12- and 24-packs.
May suit: Plunge All-In or Pro Chiller owners due for a filter change
Illustrative photo Plunge
A brand-fitted insulated cover for The Plunge tubs that reduces heat gain and blocks debris between sessions.
Placement Indoor or outdoor May suit: Existing Plunge tub owners
Illustrative photo Renu Therapy
A foam-insulated, tear-resistant vinyl cover with a child-lock safety latch system, for both temperature retention and safety.
May suit: Households with children near an outdoor cold plunge who need a real safety barrier
Illustrative photo Renu Therapy
A full year of filters and chlorine-free sanitizer sticks bundled into one purchase, sized for Renu Therapy's Cold Stoic and standard Siberian models.
May suit: Cold Stoic Classic, 2.0, or standard Siberian owners who want a year of supplies in one order
Illustrative photo Renu Therapy
A drop-in mineral stick that helps control algae and bacteria while extending filter life, lasting roughly 3 months per stick.
May suit: Buyers who want the simplest possible ongoing water care step
Illustrative photo Renu Therapy
A 25-count pack of test strips reading sanitizer, pH, alkalinity, and calcium hardness in 10 seconds.
May suit: Cold plunge owners who want to verify their water treatment routine is actually working
Illustrative photo Renu Therapy
A weather-resistant vinyl-coated polyester cover sized for Renu Therapy's Cold Stoic and Siberian tub lines, with a carry bag included.
May suit: Renu Therapy tub owners who want a weather-rated, purpose-fit cover
Illustrative photo Renu Therapy
A complete water-care starter kit — sanitizer, oxidizer, and test strips — sized for maintaining a home cold plunge between water changes.
May suit: Cold plunge owners who want a straightforward, correctly-dosed water care routine
Illustrative photo TempPro
A floating wireless thermometer with an indoor display, rated ±0.9°F from 32 to 140°F and up to 500 ft of range, for pools, hot tubs, and cold plunges.
May suit: Outdoor cold plunge or ice bath owners who want to check the water from indoors
See price on Amazon
Checked Oct 19, 2026
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