Medela breast milk bottle spare parts ensure you have clean bottles and accessories handy at all times. Convenient mesh bag for cleaning bottle parts in the dishwasher and keeping them together. Collars, discs and solid lids are perfect for long term breast milk storage. Travel cap keeps nipple clean, great for travel. Made without BPA safe for mom and baby. All Medela breast milk bottles and products that come in contact with breast milk are and always have been made without BPA.