Hydro Flask Trail 21oz (621ml) Lightweight Drink Bottle Light but mighty. Ridiculously light, and durable enough for any trail, our 21 ounce Standard Mouth Lightweight Trail Series bottle is 25% lighter than our other 21 ounce bottles and provides the best cold hydration experience for your longest adventures. The narrow Standard Mouth opening is ideal for quick sips on the trail, and the slim bottle profile stashes easily into a pack pocket. Engineered to deliver lasting cold refreshment with our TempShield® insulation in an innovative lightweight stainless steel design. Product Benefits Ideal for lightweight hydration to keep you going further Fits most backcountry hydration filters Durable 18/8 Pro-Grade Stainless Steel construction TempShield™ insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours Flexible perforated strap and aluminum pivots for added weight loss BPA-Free and Phthalate-Free Dishwasher safe
