People use the words interchangeably, and in a sense they are the same thing: you, in cold water, on purpose. The difference is everything that happens before and after those two minutes. Here is an honest comparison of the four ways people do it in the UK.
1. The ice bath
A bath, a bin or a stock tank, plus bags of ice from the petrol station. Cost to start: almost nothing. Cost to keep going: £5 to £10 of ice per session, a trip to buy it, and twenty minutes of setup. Temperature starts near 2°C and climbs fast. It is a great way to find out whether you like cold water. It is a terrible way to build a daily habit, because the habit depends on ice being in the house at 6am.
2. The chest freezer
The classic DIY route. Fill a chest freezer with water, run it on a timer so it does not freeze solid, and hope the seals hold. It gets properly cold and it is cheap. It also has no filtration, so the water turns within a week, no insulation designed for people, and a compressor that was never meant to run this way. Most of ours died within a year. Many leak. None are a thing you want next to a lawn.
3. The inflatable tub
The £100 to £300 option that floods Instagram. Some come with a small chiller. The good ones are fine for a summer. The common complaints in reviews are the same every time: seams leaking, chillers that cannot get below 8 to 10°C in warm weather, twelve-hour cooldowns, and water that needs changing every few days. They are also, put plainly, not something a homeowner wants visitors to see.
4. The chilled plunge
A rigid, insulated tub with an integrated chiller, filtration and a thermostat. You set 4°C and it stays at 4°C, in January and in July, with the lid on. Water stays clear for months. It looks like furniture. This is what people mean when they say cold plunge rather than ice bath. The price is real, £2,500 to £6,000, and so is the difference in whether you are still doing it in a year.
Side by side
| Ice bath | Chest freezer | Inflatable | Chilled plunge | |
|---|---|---|---|---|
| Holds a set temperature | No | Roughly | Sometimes | Yes |
| Ready every morning | No | Yes | Usually | Yes |
| Water upkeep | Empty each time | Weekly change | Every few days | Minutes a week |
| Lives outside in winter | No | No | Not well | Yes |
| Looks the part | No | No | No | Yes |
| Cost over three years | £3,000+ in ice | £400 plus replacements | £300 to £900 | £2,500 to £6,000 once |
What to look for if you go chilled
- The chiller. It is the part that fails, and the part most brands are vague about. Ask for the minimum temperature it holds in summer.
- The tank. A rigid shell with a stainless inner tank has no seams to leak. Soft liners do.
- Filtration. Ozone or UV plus a fine filter is what keeps the water clear for months.
- Support. Read the one-star reviews. They are rarely about the cold. They are about silence when something breaks.
That list is, not by accident, how we specified the Nordrime Fjord: stainless tank, a chiller sized for a British summer, ozone filtration, and a person on WhatsApp.