Kid-Friendly Hydration: Flip, bite, sip straw makes drinking easy for children ages 3 and up Cold for 10 Hours: Double-wall vacuum insulation keeps drinks refreshingly cold Durable and Stylish: Powder coat finish resists wear and showcases fun designs Leak-Proof and Spill-Proof: Seals securely when closed and prevents spills when open Leak-Proof and Spill-Proof: Seals securely when closed and prevents spills when open