INSULATED SIPPY. Dr. Brown's Milestones Insulated Straw Cup with sliding lid helps little ones learn straw-sipping skills while keeping drinks cool and fresh. SPILL-PROOF STRAW CUP. A travel-friendly sliding lid keeps the soft silicone straw clean and liquid in the cup when not in use. Perfect for on-the-go! EASY TO GRIP. Built for little hands, the Insulated Straw Cup is lightweight with handles that lock in place for easy grip. Remove the handles as toddler grows for more developed sipping. DURABLE. The insulated double walled tumbler keeps drinks fresh, and the durable material stands up to drops, throws, bangs, and bumps. FUN COLORS AND DESIGNS. Available in a variety of colors and playful designs. GROWS WITH BABY. Toddlers can use the Insulated Straw Cup from 12 months and beyond. Replacement straws sold separately. EASY TO CLEAN. Dishwasher (top rack) and sterilizer safe. .Dr. Brown's Milestones Insulated Sippy Cup with Straw and Handles, Spill-Proof Tumbler with Lid, 2-Pack, Green, 10 oz/300 mL, BPA Free, 12m+