Product Features:Perfect Set - Includes 2 Liters FDA Approved Food Grade Hydration BladderSuper Light - Weight 0.77 Lb With 2L Bladder In High Quality Of The Workmanship & Nylon MaterialGood Volume - Includes 2 Storage Compartments (16.5 * 9.85 Inch) And Stretch Mesh PocketsMultiple Usage Bladder - It Can Bear The Weight Of 132 Lb. The Opening Is Large Enough To Add Ice Cubes For ChillingWon't Leak - As Long As The Screw Between The Bladder And The Straw Tightened Well So As The Opening, It Won't Leak At All