For all questions please call +380 50 411 63 93 Natalia. Country of origin: Switzerland These unique bottles are made of medical polypropylene, do not contain Bisphenol-A and are completely safe for the baby's body. Designed for storage in the freezer. Ideal for storing skim milk. Provides long and reliable storage. Ideal for any medela breast pump. Made of medical high-quality polypropylene, which does not chemically react with milk and does not transmit ultraviolet rays.