Our 5 oz wide neck baby bottles are made from PES plastic, which gives them a natural golden color. They are free of phthalates and free of bisphenol A – a suspected hormone-disrupting chemical used in polycarbonate plastic, from which most baby bottles are made.Bottles are tested in the U.S. to ensure they meet the highest standards for quality and safety. Free of lead and PVC. Includes a Beginner (slow flow, 0-3 months) nitrosamine-free silicone nipple. Dishwasher safe (top rack). 100% recycled packaging.