We tested the best backpack coolers with styles for every budget and trip. Top picks include ICEMULE, Hydro Flask, and more.

Your backpack will be crammed into overhead bins or underneath aircraft seats, so look for one that’s fairly rectangular in shape, with straps and a hip belt that can be removed or tucked away.

Whether you’re hopping between cities or switching from planes to trains, the backpack’s stowable shoulder straps, removable hip belt, breathable back panel and multiple grab handles make it ...

A larger backpack for overnight trekking should be in the 50–70 liter range, have a hip belt to help distribute the load, and will vary in weight, depending on how much support and suspension ...