Invented by a mom, spbang's designer was the queen of ziploc bags, and was chucking out a truck load nightly. She then went to the reusable fabric bags but could never get them clean. So using her automotive expertise and processes, she came up with a really cool reusable snack bag. Her girls take them in their school lunch daily. She uses them for sandwiches, cut up carrots, cucumbers, baby tomatoes etc. A great idea for birthday party loot bags too. You can use them for anything. The best part is they can go in the dishwasher and actually get clean.