Cold plunge · all in one
Hydragun Supertub Cold Plunge
An inflatable all-in-one plunge with a built-in chiller, filtration, and ozone - one of the cheapest self-chilling options.
7.8
Strong
Composite (0-10), cold-plunge-v1.0
Confidence: Partial
By the numbers
- Cooling
- built-in chiller
- Coldest temp
- 34 F
- Water care
- ozone, filtration
- Insulated
- yes
- Capacity
- 80 gal
- Material
- Military-grade vinyl, insulated walls
- Est. annual electricity
- ~$200/yr
- Warranty
- 1 year
- Price
- $2,999
Strengths
- + Cooling: 10.0/10
- + Build & Insulation: 10.0/10
Watch-outs
- - Practical: 3.0/10
Who it is for
- · Anyone who wants cold water on demand without hauling and replacing ice
- · People who want low-maintenance, cleaner water between changes
How it scored
Cooling
10.0/10 · 30%Whether the unit actively chills, and how cold it gets. An ice-only tub is not a self-chilling plunge.
- +6Built-in chiller Apowered chiller included - Cools the water actively, with no need to buy or add ice.
- +2Reaches 45 F or colder B34 F - Reaches at least the 45 F range used in most cold-immersion protocols.
- +2Reaches ice-bath cold B34 F - Reaches 39 F or colder, true ice-bath territory.
Water Care
7.0/10 · 20%Ozone, UV, and filtration that keep the water clean between changes.
- +4Ozone sanitation Bozone - Ozone keeps the water clean between changes.
- +3Filtration / circulation Bfilter + pump - A circulating filter keeps debris out and water clear.
Build & Insulation
10.0/10 · 15%Insulation (holds temperature, lowers running cost) and full-immersion capacity.
- +6Insulated Binsulated shell/cover - Insulation holds temperature and lowers the chiller's running cost.
- +4Full-immersion capacity C80 gal - Large enough for full-body immersion.
Value
7.0/10 · 20%Running cost - the chiller electricity brands rarely put on the box.
- +5Chiller running cost vs class A~$200/yr electricity (below class median) - Estimated annual chiller electricity, scored against the chiller-unit median. The cost brands rarely disclose.
- +2Insulation lowers running cost Binsulated - Insulation reduces the electricity needed to hold temperature.
Practical
3.0/10 · 15%Warranty, electrical-safety listing, and plug-and-play convenience.
- +3Plug-and-play Bno manual ice - Runs without hauling and replacing ice.
What to know before buying
- · Lower-priced all-in-one that still includes a built-in chiller, so it maintains temperature without ice; manufacturer lists a minimum around 34 F.
- · At roughly $2,999 it is one of the more affordable ways to get a real chiller rather than an ice-only tub.
- · Inflatable insulated-wall design with ozone and filtration for reusing the same water.
- · Runs on standard power; factor in ongoing electricity to run the chiller.
- · Strong price-to-feature fit for buyers who want temperature hold without premium-cabinet pricing.
FAQ
- Is the Hydragun Supertub a real self-chilling plunge at its price?
- Yes. Despite being one of the cheapest self-chilling options at $2,999, it has a built-in chiller reaching 34 F, plus filtration and ozone, so in our scoring it earns its Cooling credit rather than being capped as ice-only. It is an inflatable all-in-one with 80 gallons of insulated capacity.
- How does its running cost compare?
- We estimate about $200 a year in chiller electricity, among the lowest in our chiller-unit set and below the class median, and we score that under Value as the cost brands rarely disclose. Its insulated walls help keep that figure down by reducing the power needed to hold temperature.
Last reviewed 2026-05-30. Scored under cold-plunge-v1.0. See the methodology. Informational only, not medical advice.