Bought this 10L Ice Mule to use as a cooler for work. Have been using a cooler backpack that was vinyl/plastic lined. Had to gorilla tape it several times as that material will not hold up well at all. This Ice Mule, Awesome material, rugged, and tough. this will last for a long time. This, smallest of their coolers, fits well into my backpack that i now use for work. High quality, well made, great idea. Thanks for the great solution. And for anyone wondering what fits in here…. A large ice pack, 2 32 oz water containers, a 20 oz protein shake, a sandwich in a small rubbermaid container, an additional small ice pack, room for more still. Will come back for any cooler i ever need, forget big bulky plastic ones!