The beauty of backpack coolers is that they combine the functionality of traditional coolers with the portability of a backpack, making them a must-have for outdoor enthusiasts. We tested 24 backpack coolers that are comfortable to wear and keep your drinks ice-cold for hours, whether you’re spending a beach day with the family or hiking solo. When testing the backpack coolers, we evaluated and compared the bags based on design, capacity, portability, durability, and insulation. In the ensuing several months, we put them to use in parks, at beaches, and on rooftops to see how they held up over time. Our favorite backpack coolers have plenty of padding and adjustable straps for comfort, don't leak at all, and keep our seltzer cans perfectly chilled for several hours. Top Picks Credit: REI Why We Love It The capacity is generous for keeping lots of cans cold, and the bag can collapse down for easy storage. What to Consider It doesn’t have any other storage besides the insulated main compartment.…