Keep Fresh Bags KF811C Selective Single Drip Coffee Maker with Mug Vacuum seal rolls can be cut and sealed at both ends to create your own custom sized airtight food storage bag to prevent freezer burn Heavy duty, high quality commercial grade vacuum bags made of a 7-layer construction to keep more air out A vacuum seal bag can be stored in the freezer, put into the microwave to heat food, washed in dishwasher, boiled in a pot of water, etc. Vacuum rolls are made from safe non BPA, non toxic plastic, no bisphenol, no phthalates and FDA approved materials