✓ 500ml Capacity ✓ Durable Puncture-Resistant Sleeve ✓ Leak-Proof Bite Valve ✓ Fits Most Hydration Vests A premium 500ml soft flask built for reliable hydration and long-lasting durability during trail runs, races, and endurance adventures. Our DRINKFLASK500 500ml Soft Flask features a durable, puncture-resistant construction with a high-flow, leak-free bite valve for reliable hydration during training and racing. Its wide-mouth opening makes filling and cleaning easy, while the flexible design compresses as you drink to reduce fluid movement. Designed for use with water, Neversecond C30 Sports Drink, and C90 High Carb Drink Mix, it's an ideal soft flask for running, trail running and cycling. Technical Specifications Specification Detail Capacity 500ml Sleeve Color Gray Cap Color Gray Sleeve Material TPE Product Features Feature Detail BPA-Free Yes Compatible with All Neversecond Drink Mixes Yes Dishwasher Safe No