Parent s Choice BPA-free standard neck bottles are made of FDA-approved food-grade polypropylene and silicone making them safe to use for babies. This three-count pack of 5-oz BPA and phthalate-free baby feeding bottles come with slow-flow nipples that are soft and vented to promote natural feeding and help prevent the baby from ingesting air that can cause indigestion and excess gas. Parent s Choice bottles are designed to prevent the nipple from collapsing during feeding allowing the contents to flow freely like natural breastfeeding. They also feature a secure cap that keeps the nipple clean and reduces leaking while traveling or storing them. Microwave safe and dishwasher-safe when placed on the top rack.