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A light, tidy 20L cooler for two to four on a day out

A 20L cooler backpack that holds around 30 cans at just 650g, with a welded, food-grade PEVA lining, plenty of pockets and a bottle opener on the strap.

The easygoing everyday cooler: light, tidy, welded leakproof, and priced to just grab and go.

£43.99
Fast, FREE UK delivery on all orders £30 or more. Orders under £30 pay a flat £3.99 delivery.

The easygoing everyday cooler: a 20L body that holds around 30 cans for two to four people, at a light 650g you can just grab and go with. A welded, food-grade PEVA lining keeps ice and spills sealed inside, with pockets in and out for phone and keys, and a bottle opener on the strap.

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Around 30 cansA 20L body carries meals, drinks and a picnic mat for two to four people.
Welded PEVA linerA food-grade, hot-pressed seamless lining keeps ice and spills sealed inside.
Light at 650 gAn easy-carrying bag you can just grab and go with, without the bulk.
Pockets in and outMultiple pockets inside and out organise phone, wallet, keys and snacks.

About this cooler backpacks

JANSBEN 20L Cooler Backpack

The JANSBEN 20L is the uncomplicated everyday cooler — the one you grab without thinking on the way out the door. Its 20-litre body holds around 30 cans, enough for a couple or a small group of two to four, and at 650 grams empty it stays light and easy to sling on for a walk to the park, the beach or a mate's barbecue.

The lining is where it quietly does things right: a food-grade PEVA liner that's hot-pressed into seamless, welded seams, so it's genuinely leakproof and safe against food. Melted ice and the odd spill stay sealed inside, and a wipe puts it away clean. The Oxford shell is waterproof and hard-wearing without adding bulk.

It's well sorted for the money, with multiple pockets inside and out for phone, wallet, keys and snacks, a bottle opener sewn onto the strap, and padded shoulder straps for comfortable carrying. It's not trying to be the biggest or the cleverest bag in the range — it's the sensible, light, leakproof everyday choice that just gets used.

The details

Specifications

BrandJANSBEN
ColourBlack
Capacity20L
Holdsabout 30 cans
InsulationKeeps contents cold over 5 hours with ice packs
Outer materialOxford shell with a food-grade PEVA lining
Water resistanceWaterproof
Dimensions30 x 18 x 42 cm
Weight650 g
StorageA welded leakproof PEVA lining, inside and outside pockets, a strap bottle opener, padded shoulder straps and a wipe-clean Oxford shell
CareWipe clean
Country of originChina

JANSBEN 20L Cooler Backpack

£43.99

Free UK delivery · easy returns · secure checkout

Got questions?

Frequently Asked Questions

How many people is the 20L size good for?

Two to four on a normal day out. It holds around 30 cans, so once you mix in food and ice packs it comfortably covers a couple or a small group. For a big family spread, step up to a 30L bag.

What does 'welded' PEVA lining mean?

The seams are sealed with heat (hot-pressed) rather than stitched, so there are no needle holes for liquid to escape through. That's what makes it genuinely leakproof, and the PEVA is food-grade so it's safe against unwrapped food.

Is 650g light for this size?

Yes — it's one of the lighter 20L bags, which is much of its appeal. It's built to be the cooler you grab without a second thought, so it keeps the weight and bulk down while still being leakproof and well-pocketed.

Do you deliver, and how long does it take?

Yes. Your delivery estimate for your address is shown at checkout before you pay, so you can see the timing first. Delivery is free UK-wide on orders over £30, with a flat £3.99 charge under that.

Can I return it if it isn't right?

Yes — you can return it in line with our returns policy for a refund. Keep the packaging where you can, as it makes the return tidier, and get in touch and we'll help.

The complete guide

JANSBEN 20L Cooler Backpack: the grab-and-go everyday bag

3 min read Frostline

The JANSBEN is the no-fuss cooler you'll actually reach for. Here's how to keep it at its best.

Just grab and go — but pre-chill first

Its whole appeal is being light and easy, but even the easiest cooler needs a cold start. Keep ice packs in the freezer so they're ready, drop a couple in with cold drinks, and you're out the door in seconds.

Trust the welded liner

Because the PEVA seams are heat-welded rather than stitched, you can carry loose ice and cold drinks without worrying about drips. Tip out any meltwater at the end of the day.

Use the pockets, spare the cold zone

Keep phone, wallet and keys in the inside and outside pockets so you're not opening the insulated compartment for them — every unnecessary opening lets warmth in.

Browse all cooler backpacks

Not sure this is the right size for your days out?

Tell us how many people you pack for and how long you're out, and we'll point you to the right bag in the range — honestly, even if that's not this one.

Still deciding? Ask us a question and we'll help you choose.

JANSBEN 20L Cooler Backpack £43.99