Perfect for use when travelling or at home because steri bottle is a single use baby bottle that's ready to use out of the boxNo need to wash or sterilize baby bottles or nipples because Steri bottle is manufactured at high heat in an automated clean room facility in the USACompletely BPA free and phthalate freeSingle use disposable and recyclable because the bottles and nipples are made from polypropylene (recycling code number 5)Package contains 5 complete bottles and fast flow nipples and is recommended for infants 3 months and older