# Crystals 33L Electric Cool Box, 12V DC & 240V AC

Source: https://www.ranked10.co.uk/home/best-electric-cool-boxes/crystals-33l-electric-cool-box
Ranked #9 in "Best Electric Cool Box 2026: 10 Ranked, and Why the Litre Count Misleads": https://www.ranked10.co.uk/home/best-electric-cool-boxes

- Price: £61.90 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.3 from 131 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0DVQWRPLP?tag=ranked10-21

At number nine in this guide, the Crystals 33L Electric Cool Box is a thermoelectric cooler that runs from a 12V car socket or a 240V mains plug. It costs £61.90 and carries 4.3 out of 5 from 131 ratings. On the number this category is worst at, the Crystals is at least consistent: 33 litres in the title, 33 litres in the bullet points, 33 litres in the specification, with no second 'gross' figure quietly attached. Nothing in the listing says the 33 litres is measured to the lid or includes the mechanism.

The same listing undermines it slightly. The stated dimensions are 43cm deep, 33cm wide and 46cm high, and those multiply out to roughly 65 litres of physical box. On the advert's own numbers, close to half of what you are carrying around is the box rather than the space inside it. Two other figures are worth knowing before you buy: it cools to a claimed 15°C below ambient temperature, so its performance moves with the weather and the room, and the specification lists a 30-day warranty. Of the 131 ratings, 67 are five stars and 10 are one or two stars. Everything on this page comes from the Amazon listing — we have not tested this cool box ourselves.

## Specification

| Field | Value |
|---|---|
| Price | £61.90 |
| Customer rating | 4.3 out of 5 from 131 reviews |
| Claimed capacity | 33 litres (as listed) |
| Stated dimensions | 43D x 33W x 46H centimetres |
| External volume of those dimensions | About 65 litres (calculated from the listed dimensions) |
| Power | 12V DC and 240V AC; UK plug and car lead included |
| Cooling and heating | cools to 15°C below ambient, heats to up to 65°C |
| Warranty | 30 days (as listed) |

## Questions people ask

**How much does the Crystals 33L cool box actually hold?**

The listing claims 33 litres of capacity and says the box takes 1.5L bottles upright. The same listing gives external dimensions of 43 x 33 x 46 centimetres, which multiply out to roughly 65 litres, so a large part of that volume is the box itself rather than storage space.

**Does it run in a car and at home?**

Yes. Crystals supplies a UK mains plug and a 12V car lead as included components, so the same unit works from a 240V socket indoors and from a vehicle, caravan or boat socket.

**How cold does the Crystals 33L get?**

The listing says it cools to 15°C below the ambient temperature, not to a set figure. It is a thermoelectric cooler, so how cold the contents get depends on how hot the room or car is.

**Can it keep food warm as well?**

Yes. The same unit is described as heating to up to 65°C, with a listed heating power draw of 45W to 50W. Cooling power is listed as 48W to 55W.

**What warranty comes with it?**

The specification lists a product warranty of 30 days. That is the figure printed in the listing, and it is short enough to be worth checking before you order.

**How is it rated by buyers?**

The listing shows 4.3 out of 5 from 131 ratings, with 67 of those ratings at five stars and 10 at one or two stars.