BABY’S FIRST STRAW CUP. Dr. Brown’s Baby’s First Straw Cup simplifies the bottle-to-cup transition for you and baby, helping them learn new drinking skills WEIGHTED STRAW SIPPY CUP. The soft silicone weighted straw moves with the liquid in the cup so baby can tip and sip in any direction! EASY TO GRIP. Side-grip handles make it easy for little hands to grab and hold. The cup is contoured, and the handles are removable, so it grows with baby as their cup-holding skills improve SPILL-PROOF. The spill-proof, travel-friendly sliding lid stores the straw away when not in use for on-the-go convenience and hygienic storage DURABLE. Made with durable materials that stand up to drops, throws, bangs, and bumps CONVENIENT MEASURING. Measuring marks let you see how much baby has had to drink EASY TO CLEAN. All parts are removable and dishwasher (top rack) and sterilizer safe. Includes wire brush to clean inside of straw. Do not put in microwave 8.BPA-free. 6m+