Our unique 21 oz Standard Flex Cap double wall vacuum insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure. Product Benefits: Versatile, middle-of-the-road size TempShieldâ„¢ insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours Durable 18/8 Pro-Grade Stainless Steel construction BPA-Free and Phthalate-Free Compatible with Standard Mouth Insulated Sport Cap Lifetime Warranty Care and Use: Not for use on a stove, in a microwave or freezer. Not intended for use with carbonated beverages. Diameter2.81",Mouth Diameter1.91",Height9.4",Weight11.3 oz,Volume621 mL STANDARD MOUTH NEW