• Comes with standard neck bottle 4oz. • BPA-free. • All parts except nipple, valve and pump are made of polypropylene (PP). • Nipple and valve are made of silicone. • Pump is made of rubber. • Designed for breastfeeding mothers to express breast milk conveniently. • Helps to relief painful breast engorgement. • Hand operated breast pump. • Easy to use and clean.