The Philips AVENT Sealing Disc allows you to convert any Philips AVENT feeding bottle or cup to a storage container. Ideal for storing and freezing expressed breast milk or food, Philips AVENT Sealing Discs offer perfect everyday practicality whether at home or on the move. Safe for use in the freezer, microwave and dishwasher, Philips AVENT Sealing Discs are designed to make feeding time simple. A special wipe-clean plastic lets you write on the disc for storage, allowing you to keep track of date and contents.