Product features: Ardos high-quality, sealable bottles are the perfect way to store precious breast milk. These practical bottles, made of BPA-free plastic (polypropylene), collect expressed breast milk for your baby and are ideal for hygienic storage. Properly sealed, breast milk will keep for approximately three days in the refrigerator. Key features at a glance: Contains 3 vials with scale and sealable lid high-quality BPA-free milk bottles Suitable for Ardo pump sets and the Ardo Amaryll manual breast pump Suitable for common vacuum cleaner systems Source: www.ardo.de As of February 2019