About This TASTE-FREE & CLEAN: Food-grade, USA-made film has no plastic taste and is BPA-free. Increased airflow from the self-expanding opening dries super-quickly and completely. No leftover water to generate mold and mildew. BUILT TO LAST: High-quality, flexible, puncture-resistant materials and strong welded seams are leakproof and backed by a Lifetime Warranty. WIDE OPENING: Easily add ice and liquid with the wide-mouth opening. MADE IN THE USA FILM: Guarantees high-quality, food-grade, BPA-free materials. HIGH FLOW DRINKING: 39" length, large-bore 5/16" inner dimension drink tube offers 20% faster flow than before. GYZR WIDE ANGLE BITE VALVE: High-flow, 360-degree bite valve with shut-off and hygienic cover. Just twist the bite valve sheath for streaming flow. FLIP-N-STICK MAGNETIC RETAINER: Ensures your bite valve is always within easy reach. Overview Brand : Mazama Color : clear Material : Polyethylene Vinyl Acetate (EVA) Sport : Hiking, biking, mountain biking, running, camping, climbing Item Weight : 6.7 Ounces