Mountain Bike Hydration Lumbar Replacement Reservoir from Dakine with wide mouth opening. Details: Dakine hydrapak design, low profile Shape-Loc center baffle, Plug-N-Play quick tube connector, wide mouth opening allows for easy fill and cleaning, high-flow Blaster valve with shut-off, BPA and PVC free, FDA approved polyurethane (TPU) material, limited lifetime warranty. Details: 100 ounces (3 liters). Material: Polyurethane.