Our unique 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 Ideal size for all-day hydration Fits most backcountry water filters TempShieldâ„¢ insulation 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 Dishwasher safe Compatible with our Wide Mouth Flex Sipâ„¢ Lid and Wide Mouth Straw Lid Lifetime Warranty,3.58" Diameter,2.26" Mouth Diameter,9.4" Height,15.2 oz Weight