The Camping Ice Pack That Ends Up Living in Your Freezer Door All Year
A bag of single-use ice melts into a soggy mess by lunchtime. These KEPLIN gel blocks go back in the freezer and do it all again next weekend, and buyers tell us they rarely leave the kitchen between trips. Six of them cost less than a round of drinks, with one slim-size point worth checking before you order.
Picture the cool box on day two of a camping trip. With a bag of supermarket ice, you are already fishing cans out of cold water and your cheese has gone for a swim. That is the problem KEPLIN's reusable freezer blocks set out to fix, and at £5.99 for six it is an easy enough punt to take.
The headline numbers are reassuring: a 4.5-star average from more than 8,700 ratings on Amazon UK. But the thing that jumped out reading the recent reviews is how few buyers stop at camping. They keep these in the freezer door year-round and reach for them for school lunches, expressed milk, even ferrying a pet's insulin home from the vet. We read through those reviews to find out what these blocks actually do well, where buyers get caught out, and the one slim-size point worth checking before you order.
What you actually get for £5.99
Six rigid gel blocks, each measuring 15.5 x 8.5 x 2.5 cm. They are filled with a long-lasting cooling gel rather than plain water, sealed in BPA-free, puncture-resistant plastic, and heat-sealed so they will not leak when they thaw. You freeze them overnight, drop them into whatever you are keeping cold, and refreeze them when you get home. Wipe them clean with a bit of soapy water and they are ready for the next outing.
That slim profile is the design point worth flagging early. Each block is only 2.5 cm thick, so they slide down the sides of a cool bag or sit flat under a layer of food without stealing all your packing space. KEPLIN sells them on the idea that you get decent cooling surface area without the bulk of a single chunky brick, and for the most part buyers agree.
Buyers say the cooling lasts for hours
The single most common thread across the reviews is that these hold their cold for hours. One buyer, jacqueline tulloch, summed up the prevailing mood: "These are great keeps frozen for hrs would recommend these they are great & just the right size." Several reviewers echoed that they kept food and drinks chilled well beyond a typical picnic window.
The most useful data point comes from Flop3511, who bought them for an air cooler but then took them somewhere more demanding: "used them in my Bergen on the hottest day of the year and lasted well cooling drinks down. Easy to use and versatile." A Bergen (army-style rucksack) on a heatwave day is about as tough a test as a cooling block gets in the UK, and they held up. For weekend car camping or a day at the beach, that bodes well.
These blocks moonlight far beyond the campsite
What surprised us reading the reviews is how rarely people use these purely for camping. They have quietly become a household multi-tool. Becky S keeps hers for expressed milk on the go: "Fits perfectly in my small milk expression cool bag and the door of my freezer! Keeps cold for a quite a while." Rotimilove reaches for them for a more everyday job, calling them "so handy, very useful for kids lunch box."
Then there is lou lou, whose review reads like a stress test. She bought them as freezer hold-all blocks while swapping out a fridge freezer, used them to keep food frozen during the changeover, and also pressed them into service ferrying her cat's insulin home from the vet. Her verdict: "very durable and versatile. The colour is fine and they are easy to transport out of doors. They fit nicely into outer bags and are easy to use and store." If you are buying six anyway, it is worth knowing they will get used in the freezer door between trips, not just gather dust until August.
Why slim 2.5cm blocks beat one chunky brick
The most repeated criticism is size, and it comes up even among otherwise positive reviews. Dicky Skidmark left four stars with a blunt note: "Very small, adequate." Kel, who gave three stars, admitted the surprise was partly self-inflicted: "I thought they would be bigger but I didn't read the size guidelines lol."
So set your expectations on the spec, not the photo. At 15.5 x 8.5 x 2.5 cm these are lunch-bag and small-cooler blocks, not chunky bricks for filling a 30-litre cool box on their own. That slim shape is deliberate, though: six thin blocks give you far more cold contact area than one fat brick, and you can tuck them flat against food or slide them down the sides of a bag. For a kids' lunch box, a milk cool bag, or chilling a few cans, one or two are plenty. For a big family cool box on a hot day, you stack four or five together, which is exactly why the six pack makes sense. Check the dimensions against your cool box before you order and the size stops being a complaint and starts being the point.
One question new buyers keep asking
Worth clearing up, because a reviewer raised it directly. Kel asked: "do I freeze straight away or do I need to change the water inside?" You freeze them as supplied. The cooling gel comes ready inside each block, so there is nothing to prepare first: just take them out of the packaging and put them in the freezer. After use they thaw, you refreeze, and the cycle repeats over and over.
A practical tip from the reviews: a longer freeze gives a longer hold. If you are heading out for a full day, lay them flat overnight in the coldest part of the freezer rather than giving them a quick couple of hours.
Should you add them to your cool box kit?
For £5.99, this is one of the easiest yes calls in the cool box aisle. The 4.5-star average from over 8,700 ratings is backed up by what the recent reviewers actually do with them: lunch boxes, picnics, fishing trips, expressed milk, emergency freezer duty, and at least one Bergen on the hottest day of the year. The cooling holds for hours and they slot into a bag without the bulk of a solid brick.
The only thing standing between you and a happy purchase is reading the dimensions first. These are slim 15.5 cm blocks, so size them to your cool box: a couple for a lunch bag, four or five for a family cooler. Get that right and the six pack is hard to fault for the money. Buy the wrong expectation and you will be the next person writing "smaller than I thought" in the reviews. Now you know, so you will not be.
KEPLIN Freezer Ice Blocks (6 Pack) Reusable Ice Packs
Six slim, long-lasting gel blocks that keep cool boxes, lunch bags and picnics cold for hours, then go straight back in the freezer for next time.