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 BenefitsIdeal size for all-day hydrationFits most backcountry water filtersTempShield insulation keeps beverages cold up to 24 hours and hot up to 12 hoursDurable 18/8 Pro-Grade Stainless Steel constructionBPA-Free and Phthalate-FreeDishwasher safeCompatible with our Wide Mouth Flex Sip Lid and Wide Mouth Straw LidLifetime Warranty,3.58 Diameter,2.26 Mouth Diameter,9.4 Height,15.2 oz Weight