What's included: 2 x hegen transparent covers **hegen pcto collar and hegen teat not included description: replacement covers are available in packs of 2 in the event that these covers are misplaced or damaged. In addition, these multi-functional covers can be used as feeding cups for soft food or liquids. Due to hygiene reasons and wear and tear, we recommend replacing these covers every 6 months. directions for use: to remove transparent cover with the hegen logo on the collar facing you, push the transparent cover backwards (away from you) to open. features: revolutionary no screw thread one-handed closure (patent pending). Press-to-close, twist-to-open, pcto innovation for hassle-free handling and avoiding spillage. air venting bypasses the milk minimizing formation of air bubbles and oxidation of precious nutrients. Built-in anti-colic air vent reduces unwanted air intake. elliptical-shaped silicone teat closely mimics a mother's breast to simulate a real latching experience, making combining breast and bottle feeding possible. Off-centre teat enables your baby to feed in a natural upright position. express, store and feed within a single container with interchangeable pump or adapters, feeding collars and storage lids. No wasteful transfer of milk necessary. hassle-free cleaning: the smooth interior surface, wide bottle opening and minimal parts make cleaning exceptionally easy.