A superstar among ordinary water bottles. Its size and transport-ability make it a staple among outdoor enthusiasts. Keep your water ice cold from the trail-head all the way to the mountaintop. This Hydro is an ideal size for all-day hydration, equipped with our Wide Mouth Straw Lid for easy sipping. Fits most back-country water filters. Temperature shield insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours. Durable Pro-Grade Stainless Steel construction that's BPA-Free and Phthalate-Free. Compatible with our Hydro Flip Lid and Wide Mouth Flex Cap Lifetime Warranty. Straw Lid is not intended for use with hot liquids and is not leak proof.