These compact nipple brushes are perfect for cleaning inside nipples from a wide range of brands, as well as reaching into the nooks and crannies of all your feeding gear. Bristles are made of safe, durable nylon. The bristle holders are made of stainless steel, and the handle is polypropylene. for a complete transfer-free, hassle-free breast milk collection, storage, preparation, and feeding system: DIRECT-PUMP into Kiinde Twist Pouches, recyclable breast milk storage pouches with twist-locking caps. Using Kiinde Direct-Pump twist-locking adapters, Twist Pouches twist-lock onto pumps from all major brands, for leak-free, transfer-free pumping. STORE and organize pouches in the Kiinde Keeper breast milk holder and organizer, and THAW and WARM quickly and safely using the Kiinde Kozii breast milk warmer and bottle warmer with steam-free SAFE heat technology.