Jamie Caldwell had been doing day hikes with a standard rucksack and a separate cool bag for years, which was awkward, heavy, and meant his food was lukewarm by lunchtime....
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The TOURIT 30-Can Insulated Cooler Backpack holds 30 cans with 16-hour temperature retention, a leak-proof liner, weighs just 500g, and features a built-in bottle opener on the strap plus multiple...
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