TempShield™ 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 Our Wide Mouth refresh features a stainless-steel collar and curved radius at the bottom edge for an updated look Ideal size for all-day hydration Fits most backcountry hydration filters BPA-Free and Phthalate-Free Dishwasher safe