Philips avent food storage cups are a convenient way to transport and store your baby food at home or on the go each cup is stackable and includes a leak proof twist on lid for secure storage and transport and you can feed baby straight from the cups using a teat adapter cups are compatible with all philips avent breast pumps simply attach the cup to the pump using an adapter and express the cups are sterile packed for immediate use and can be re sterilised when showing signs of wear an tea