The NGN Sport - Handheld Running Water Bottle / Hydration Pack from Engine Design Group can carry 10 fluid ounces (300 ml) of hydration, plus several smaller items like: keys, gels, money, credit cards, ID and other essentials inside the zippered storage compartment. Our 10 oz. capacity size is perfect for the minimalist who enjoys to “travel light” during runs and workouts, and is ideal for 20-40 minute* workouts, and for longer runs when fluid fill-ups are available every few miles.Features: Fully adjustable padded hand strap is constructed using 3D nylon sport mesh that dries quickly and greatly helps reduce grip fatigue. Reflective trim will help keep you visible to others during low light hours. This added feature will help keep you safe during early morning and evening outdoor workouts. Corrosion resistant metal components provide extra durability, at specific stress points, to help ensure a long life of trouble free use. Softer rubber mouthpiece poppet, is easy to open (push/ pull), and is gentle on the mouth and teeth, and is guaranteed not to leak, drip, seep or splash. Removable bottle is dishwasher safe (top rack). Water Bottle Pack weighs approximately 4 oz when empty. The zippered storage compartment measures 1” x 3” x 4” (12 cu in), enough space for approximately 3-4 gels. COMPARTMENT CANNOT ACCOMMODATE CELL PHONES. Our Hydration Packs are backed with a 100% Satisfaction Guarantee and a Limited Lifetime Warranty. Quality, Built to Perform and Endure.*Sweat rate/ fluid consumption can vary greatly from person to person. Always conduct practice tests with all new Gear. Always consult your physician before beginning any exercise program. If you experience any pain or difficulty during exercise, stop and consult your healthcare provider.