As your child becomes more active at ages 12 months and up, these insulated cups are designed for versatility and ensure that drinks remain cool and fresh twice as long**, whether playing indoors or out! Insulated to Keep Drinks Cool Longer: •With double walled insulation, these Stage 3 cups keep drinks cool twice as long as a regular cup, making them great for active little ones. •Streamlined Ergonomic Design: The unique ergonomic design of Stage 3 cups make it easy for those little hands we love so much to hold them. •For ages 12 months and older, 9 oz size, unique spill-proof valve eliminates messes and is easy to clean. •Double walled insulation keeps drinks cool 2x as long as a regular cup, making them great for active little ones. •BPA Free, all parts are top rack dishwasher safe, or can be hand washed- Leak-Proof Guarantee. *Playtex Sipsters cups are leak-proof, spill-proof and break-proof guaranteed!