INSULATED HARD SPOUT CUP. Dr. Brown’s Milestones Insulated Hard Spout Sippy Cup is a spill-proof transition cup that helps toddler learn new drinking skills while keeping drinks cool and fresh. SPILL-PROOF CUP. The travel-friendly spout features a spill proof one-way valve. EASY TO GRIP. Built for little hands, the sippy cup is lightweight with handles that lock in place for easy grip. Remove the handles as little one grows for more developed sipping. DURABLE. Bite-proof spout and insulated double wall construction made with durable materials that stand up to drops, throws, bangs, and bumps. FUN COLORS AND DESIGNS. Available in a variety of colors and playful designs. GROWS WITH BABY. Little one can use the double walled sippy cup from 12 months and beyond. EASY TO CLEAN. Dishwasher (top rack) and sterilizer safe. BPA free. 12m+.