Calma is a feeding set that includes a vented, no-drip nipple. Calma is made without BPA and is safe for the top rack of the dishwasher. Care Instructions: Plastic containers and component parts become brittle when frozen and may break when dropped. Plastic containers and component parts may become damaged if mishandled, e.g., dropped, over-tightened or knocked over. Take appropriate care in handling containers and component parts. Do not use if the plastic container or component parts become damaged.