Perfect for all mothers with everything needed in our Essentials Starter Kit Express, Store, Feed within a single container with no wasteful transfer of milk necessary! With a feeding bottle ranging from 60ml/2oz, 150ml/5oz, and 240ml/8oz sizes, mothers may choose to use the size most suitable for the baby. The breast milk storage lids also allow the feeding bottles to be easily converted to airtight and secured storage containers by simply swapping the interchangeable lids. One container, different lids – minimal hassle with maximum convenience! Everything happens within a single container, minimising wastage and making every drop count. All Hegen bottles are made of PPSU (Polyphenylsulfone), an FDAcompliant material which combines the advantages of both glass and plastic materials. It is widely used in the manufacturing of medical appliances due to its superior toughness and high temperature resistance ranging between 20°C to 180°C. This means you can deep freeze or heat up breastmilk in Hegen’s feeding bottles directly, making it a breeze to express, store and feed!