It's never been easier to take your snacks on the go! When you're done, just collapse the box and secure the snaps for a 50% space-saving and a spill-proof seal. No more crumbs in the bottom of your bag. The temperature tolerance of this collapsible food container is an impressive range of -8'F to 447'F (-40'C to 230'C). Not only are they microwave and freezer safe, but also dishwasher safe. Just pop them in the top layer of your dishwasher for easy cleaning. These collapsible containers make storing leftovers, fruits, and vegetables in the refrigerator a breeze. You can even use them in the freezer for ice cubes or in the microwave for baking. And if you're going on a camping, hiking, or picnicking trip, they can work as an ideal lunch box. The possibilities are endless!