For a simple, effective large capacity flask look no further. This is surprisingly lightweight for the size and it keeps hot (or cold) for a good amount of time. Perfect for long day trips. \nHydro Flask says:\nBring more, carry less. Generously sized for your longer pursuits, our 40 oz (1,183 ml) Lightweight Trail Series bottle is 25% lighter than our other 40 oz bottles, thanks to an innovative stainless steel design. Engineered to deliver the same cold refreshment you expect from Hydro Flask but without the weight, the Trail Series makes it easy to take your cold hydration as far as your spirit of adventure takes you.\n\nOur Verdict\nThe Hydro Flask 40oz Lightweight Wide Mouth Trail Series balances capacity and portability. At just 420g, its 25% lighter than similar bottles yet durable enough for demanding trails. Its 1,183ml capacity and reliable TempShield insulation keeps drinks cold for 24 hours and hot for 12 hours, so this flask will see year-round use, making it ideal for long adventures.\n- Reviewed by Ultralight Outdoor Gear\n\nFeatures\n\nIdeal for lightweight hydration to keep you going further\nFits most outdoor hydration filters\nDurable 18/8 Pro-Grade Stainless Steel construction\nTempShield insulation eliminates condensation and keeps beverages cold for up to 24 hours and hot for up to 12 hours\nFlexible perforated strap and aluminum pivots for added weight loss\nBPA-Free and Phthalate-Free\n\n\nSpecifications\n\nWeight: 420g\nVolume: 1183 ml\nDiameter: 3.3\

For a simple, effective large capacity flask look no further. This is surprisingly lightweight for the size and it keeps hot (or cold) for a good amount of time. Perfect for long day trips. Hydro Flask says:&nbsp