Feed your baby on the go with the Medela Breast Milk Bottle Spare Parts Kit, Clear and Yellow, 87165, 13 Piece Set. It comes with most of what you need. Use the included mesh bag to keep all of the components safely together in the dishwasher. It also comes in handy for storage or transport. The collars and caps keep the nipple clean during storage. These Medela replacement parts are compatible with all standard Medela bottles. They're free of BPA, which makes these pieces safer for use by young children.