Premium cold plunge systems with built-in chillers usually cost between $4,000 and $14,000. That price stops a lot of people before they ever try cold water therapy. The good news is that most people can start for under $500 with an insulated tub, a lid, and bags of ice.
This guide covers what you get (and give up) at that price, which tub size fits your body and your space, how much ice you'll really use, and the point where it makes sense to upgrade to a chiller.
The Short Answer
For most beginners, a 90–130 gallon insulated tub with a lid, filled about three-quarters full and cooled with ice, is the best value. You'll pay a few hundred dollars upfront and roughly $10–$30 in ice when you cool a fresh fill. If you're plunging every day after a few months, a chiller starts paying for itself.
Budget Tub vs. Premium Chiller System
| Budget tub (under $500) | Chiller system ($1,000+) | |
|---|---|---|
| How it gets cold | Ice, cold tap water, cold weather | Electric chiller holds a set temperature |
| Water care | Manual: lid, skimming, regular water changes | Usually built-in filtration and sanitation |
| Setup | Minutes, no electrician needed | May need a dedicated GFCI outlet |
| Portability | Folds or deflates for storage | Mostly stays in one place |
| Running cost | Ice purchases | Electricity |
| Best for | Trying cold plunging, plunging a few times a week | Daily plungers who want zero hassle |
Pick the Right Tub Size
Size matters more than most people expect. You want to sit with water at your shoulders without folding yourself in half. These are the cold plunge tubs we carry under $500:
| Tub | Price* | Best for |
|---|---|---|
| 66-Gallon Outdoor Cold Plunge Tub with Lid | $79.99 | The lowest-cost way to find out if you'll stick with it. Best for smaller frames. |
| Portable Cold Plunge Ice Bath Tub | $116.54 | Small spaces, apartments, and travel |
| Portable Cold Plunge Tub with Thermo Lid | $245.00 | People who want the water to stay cold longer between sessions |
| 97-Gallon Portable Cold Plunge Tub with Cover | $349.00 | Most adults. It measures about 33.5" × 33.5" × 29.5" and supports up to 660 lbs. |
| XL 129-Gallon Oval Cold Plunge Tub with Cover | $356.99 | Taller users. The oval shape lets you stretch your legs out. |
*Prices at time of writing. Check each product page for current pricing.
Quick rule of thumb: if you're over about 5'10", or you want to sit with your legs extended, go for the XL oval. If you're under that and space is tight, the 97-gallon is the sweet spot.
How Much Ice Do You Actually Need?
Most budget guides skip this part, so here's the actual math.
Water holds about 1 BTU of heat per pound for every degree Fahrenheit. A gallon of water weighs about 8.3 lbs. Each pound of ice absorbs about 144 BTU just by melting, plus a bit more as the meltwater warms. That works out to:
- Cooling 70 gallons from 70°F to 50°F takes about 70 lbs of ice (seven 10-lb bags).
- A useful shortcut: about 1 lb of ice per gallon for a 20°F drop.
- You don't need to fill a 97-gallon tub to the top. Your body displaces a lot of water, so about 70 gallons is usually plenty.
At typical bagged-ice prices, that's roughly $15–$30 to cool a fresh fill. After that, the lid does most of the work. You'll top up with a bag or two instead of starting over each time. In fall and winter, cold tap water and outdoor temperatures may get you most of the way there for free.
Ways to spend less on ice
- Freeze your own blocks. Refill and freeze a few gallon jugs or large food containers. Blocks melt more slowly than cubes and cost nothing to make.
- Keep the lid on. An uncovered tub picks up heat from sun and air much faster.
- Pick a shady spot. Direct sun can undo a lot of ice in an afternoon.
- Plunge in the morning. The water is at its coldest after the overnight temperature drop.
When Is It Worth Upgrading to a Chiller?
Here's a simple way to decide. Add up what you spend on ice each month. If you plunge 5 days a week and buy $15–$20 of ice each time, that's $300–$400 a month. At that rate, a chiller pays for itself within a few months.
Options when you're ready to step up:
- Absolute Zero Cold Plunge Chiller: a 0.8 HP chiller. Standard is $999 and Pro is $1,399 at time of writing.
- RevX Inflatable Cold Plunge Tub Deluxe: $699
- Nicebeam Cryo Pro 216-Gallon Cold Plunge System: $2,499
Not every chiller connects to every tub. Contact us before you buy and we'll confirm what works with your setup.
Keeping the Water Clean
Budget tubs don't have built-in filtration, so a little routine goes a long way:
- Rinse off before you get in. Lotion, sweat, and sunscreen are what make water go cloudy.
- Keep it covered to keep out leaves, bugs, and sunlight, which feeds algae.
- Skim out debris with a small pool net.
- Change the water every 1–2 weeks, or sooner if it looks or smells off. If you use a spa-safe sanitizer, follow the label exactly.
- Drain and dry the tub completely before storing it.
Your First Plunges: Start Gentle
Cold water hits harder than you expect. Most beginners do well with:
- Water temperature: 50–59°F. You don't need ice-bath extremes to start.
- Time: 1–3 minutes. Build up slowly over weeks.
- Breathing: slow, controlled breaths, especially in the first 30 seconds.
- Warming up: towel off, get dressed, and move around. Avoid jumping straight into a hot shower.
Safety first: don't plunge alone for your first few sessions, and get out right away if you feel numb, dizzy, or confused. If you have a heart condition, high blood pressure, Raynaud's, a cold allergy, or are pregnant, talk to your doctor before trying cold water immersion.
A note for lifters: research suggests that regular cold water immersion right after strength training may reduce muscle-building gains over time. If muscle growth is your goal, give yourself a few hours between lifting and plunging.
What Does the Research Say?
Cold water immersion is still being studied. A 2025 systematic review in PLOS One found it was linked to lower stress about 12 hours afterward, with some evidence for better sleep quality. It also found that many effects were short-lived and that most studies were small. Treat cold plunging as a recovery and wellbeing habit, not a cure-all, and pay attention to how you feel.
Your Setup Checklist
- Level ground (a full tub weighs hundreds of pounds)
- A spot near a hose or faucet for filling and draining
- Shade, or at least shelter from afternoon sun
- A floating thermometer
- A timer (your phone works)
- An outdoor mat or towel to stand on
- The lid, back on after every session
Frequently Asked Questions
Can I just use my bathtub?
You can, but standard bathtubs are shallow and hard to keep cold. Tap water often won't go below about 55–60°F, so you'll need a lot of ice. A dedicated tub with a lid holds the cold far better.
Can I leave my cold plunge tub outside in winter?
Many portable tubs are made for outdoor use, but standing water can freeze and damage the tub. In freezing weather, drain it or bring it inside, and check the product page for care instructions.
How cold should a cold plunge be?
Start at 50–59°F. Experienced plungers often go down to the 39–50°F range, but colder isn't automatically better. Consistency matters more than the number on the thermometer.
How often should I cold plunge?
Many people start with 2–3 sessions a week and adjust from there. Short, regular sessions are easier to stick with than occasional long ones.
Is a $350 tub as good as a $5,000 plunge?
The cold water feels the same. What you pay for at the higher end is convenience: automatic chilling, built-in filtration, and no ice runs. Many people start with a budget tub and upgrade once cold plunging is part of their routine.
Ready to Start?
Browse our full range of cold plunge tubs and chillers, from entry-level tubs to full chiller systems. Every order over $50 ships free in the U.S.
This article is for general information only and isn't medical advice. Talk to a healthcare professional before starting cold water therapy, especially if you have a medical condition.