Leak Proof Straw Lid: 100% Leak proof lid when closed, easy opening Straw Lid for kids, super comfortable and enjoyable to open and drink. Vacuum Insolated: Insulated water bottle, double wall insulation and vacuum insulation makes the Cubitt Kids Bottle sweat-free. Keeps kids hands dry. Liquid Temperature: Keeps your drink cold for up to 24 hours. Not recommended for hot drinks. Premium Stainless Steel: Made of 304 stainless steel and Bpa Free to protect the hydro bottle from oxidation, no smell, no flavor and it will not leave a metal taste or rust. Size: Cup holder friendly. The 14 oz kids bottle fits perfectly in every cup holder. Perfect sizing for kids.