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Kaldera Cold Therapy Plunge 550 XL vs MyoMaster MyoIce Plus

Kaldera Cold Therapy Plunge 550 XL, inflatable or portable tub
Image: Kaldera Cold Therapy
MyoMaster MyoIce Plus, inflatable or portable tub
Image: MyoMaster

Two cold plunge tubs side by side: Kaldera Cold Therapy Plunge 550 XL at £149 and MyoMaster MyoIce Plus at £149. Prices and specifications checked against each maker's page, last on .

Quick answer: On the published data the Kaldera Cold Therapy Plunge 550 XL comes out ahead: it holds more water (550 L against 320 L), useful if you are tall or want room to move.

Choose the Kaldera Cold Therapy Plunge 550 XL if

  • it holds more water (550 L against 320 L), useful if you are tall or want room to move

Choose the MyoMaster MyoIce Plus if

Nothing in the published data puts it ahead.

Kaldera Cold Therapy Plunge 550 XLMyoMaster MyoIce Plus
UK price£149£149
TypeInflatable or portable tubInflatable or portable tub
Capacity550 L320 L
Includes chillerNoNo
MaterialPVC with cross-braced steel frameSkin-safe PVC, 5-layer insulation (inflatable)
InsulationNot statedNot stated
DimensionsNot statedNot stated
Weight (empty)Not statedNot stated
VoltageNot statedNot stated
FiltrationNot statedNot stated
Outdoor useNot statedYes
App controlNot statedNo
WarrantyNot stated1 year
Tested by usNoNo
Where to buyCheck price at Kaldera Cold TherapyCheck price at MyoMaster

Buying facts

Kaldera Cold Therapy Plunge 550 XLMyoMaster MyoIce Plus
Price per litre of capacity£0.27£0.47
Ice to cool from 15C to 8C, per plunge54 kg31 kg
Brand rating on TrustpilotNo profile found4.5 from 2,160 reviews
Newest Trustpilot reviews we readn/a2 of 15 at 1-2 stars
Where the seller is basedNot statedUnited Kingdom

Trustpilot scores cover the whole brand and its service, not this model alone; we read the newest reviews on each profile at every data run. How we check the data.

Price history

FromKaldera Cold Therapy Plunge 550 XLMyoMaster MyoIce Plus
Not tracked yet£149

No tracked price has changed since 8 Sept 2026; last checked 5 Oct 2026.

What the numbers say

On price, the MyoMaster MyoIce Plus is £0 cheaper than the Kaldera Cold Therapy Plunge 550 XL (£149 against £149 in the UK at the time of writing).

Capacity: Kaldera Cold Therapy Plunge 550 XL 550 L, MyoMaster MyoIce Plus 320 L (advantage Kaldera Cold Therapy Plunge 550 XL).

We have not tested either unit ourselves, so this comparison is built from the makers' specifications, UK pricing and owner feedback; each product page says the same.

Frequently asked questions

Which holds more water, the Kaldera Cold Therapy Plunge 550 XL or the MyoMaster MyoIce Plus?

The Kaldera Cold Therapy Plunge 550 XL: about 550 litres against 320 litres.

Do the Kaldera Cold Therapy Plunge 550 XL and the MyoMaster MyoIce Plus come with a chiller?

No. Both are cooled with ice or a separate chiller. Our ice calculator and chiller sizing calculator show what each option needs.

Related comparisons

Read the full pages

Cold water immersion places real stress on the heart and circulation. Anyone with a cardiovascular condition, high blood pressure, a history of arrhythmia, or who is pregnant should speak to a doctor before using a cold plunge. Never plunge alone. Start with short sessions at mild temperatures and progress gradually. Read the full safety guide.

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