Zip Top containers were designed to be more versatile than any other storage option on the market. They can be used in the microwave, dishwasher and freezer - and have countless uses in the kitchen and beyond. Their patented design stands up, stays open and zips shut, unlike anything that exists in the world! Zip Top containers are plastic-free and endlessly re-useable, made with 100% platinum silicone, and are proudly made in the USA.