Plate Carrier Hydration Hard Bladder CoyotePerformance BPA 1. 75L Shaped Cooling And Hydration Bladder For Plate Carriers LBE Rear of backpacks. This is a unique device use it cool your back and or front then once unfrozen it can be used as a secondary hands free hydration system ! Universal fit will fit all common size plate carrier vest rigs that carry the 12 x 10 inch plates. Capacity: 1. 75L of fresh water or add ice and use as a cooler behind LBE vests and or packs. Most people use ice as