Picnics, festivals and long drives to the coast all come down to one dull question: will the food still be cold when you get there? Cool boxes have quietly got good at answering it. We compared the ones Which? and regular campers rate, from a £45 box that runs off your car to a Yeti that keeps ice frozen for two days straight.
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The short version
For a camping weekend, the Coleman Xtreme 5 Day. For road trips, an electric box like the Halfords 12V. For serious heat or several days off-grid, a Yeti or Igloo. For festivals, the wheels on the Igloo Trailmate earn their keep.
How they compare
| Cool box | Type | Keeps cold for | Price |
|---|---|---|---|
| Coleman Xtreme 5 Day | Passive (ice) | around 2 days | around £50 |
| Yeti Tundra | Passive (ice) | around 52 hours | around £250+ |
| Igloo Trailmate | Passive, wheeled | around 2 days | around £90-120 |
| Halfords 12V (8L) | Electric | While powered | around £45 |
The cool boxes worth buying
Coleman Xtreme 5 Day
Best for campingThe default British camping cool box, and for good reason. Coleman claims five days of ice retention. In a real UK summer you will get a couple of days, which covers a weekend with room to spare, and it costs a fraction of the premium boxes.
The catch: It is bulky to store, and the smaller sizes have no wheels, so a full one is a proper two-handed carry.
Passive, around 2 days cold in real use · around £50
Check price on AmazonYeti Tundra
Best ice retentionWhen Which? tested ice retention, the Tundra lasted longest at about 52 hours, and it is built like it could survive being sat on by a car. If you camp often or fish, this is the box you buy once and keep.
The catch: It is heavy even empty, and the price is very hard to justify for the occasional picnic.
Passive, around 52 hours cold · around £250+
Check price on AmazonIgloo Trailmate
Best for festivalsA wheeled box made for dragging across a field. It has big all-terrain wheels, a handle you can actually push, and handy extras like a built-in bottle opener and a phone shelf. Ice lasts a couple of days, too.
The catch: Those wheels make it awkward to store and it eats a fair chunk of boot space.
Passive and wheeled, around 2 days cold · around £90-120
Check price on AmazonHalfords 12V In-Car Electric Cool Box (8L)
Best electricThis one plugs into your car’s 12V socket and chills as you drive, so there is no ice to buy or melt. At 8 litres it is sized for drinks and lunch on a day out rather than a week’s food shop.
The catch: It cools relative to the outside temperature rather than to a set cold, so on a really hot day it takes the edge off instead of making things icy. Leave it running with the engine off and it will flatten your battery.
Electric (12V), cools while powered · around £45
Check price on AmazonPassive or electric?
A passive box is just very good insulation. Fill it with ice or freezer blocks, and how long it stays cold depends on the build and how often you open the lid. An electric box plugs into a 12V socket and cools without any ice, which is brilliant on a long drive and useless once the car is off, unless you have a leisure battery. For most people a good passive box plus a couple of freezer blocks is simpler and cheaper. If you mostly use it in the car, electric saves you the hassle of buying ice.
Common questions
Passive or electric cool box?
Passive for camping and picnics where there is no power, electric for road trips where you can run it off the car. Plenty of people end up owning one of each.
How long does a cool box keep things cold?
A budget box gives you roughly a day, a good mid-range box two to three days, and a top Yeti or Igloo can hold ice past the two-day mark. Opening the lid less and pre-chilling the box both help a lot.
Will an electric cool box drain my car battery?
Running off the 12V socket with the engine off will eventually flatten a normal car battery. Use it while you are driving, or wire it to a separate leisure battery if you camp off-grid.
Are expensive cool boxes worth it?
Only if you use them often. For the odd picnic a Coleman does the job fine. If you camp or fish most weekends, a Yeti or Igloo pays off in the ice you are not constantly buying.
Heading out in the heat? Pair it with one of the portable neck fans we looked at, or see more Sports & Outdoors picks.