Stay hydrated on your outdoor adventures with the Gregory 3D Hydro 2L Reservoir Optc/Blu. This high-quality reservoir is designed to comfortably fit in your backpack and provide you with easy access to water while on the go. The 3D construction keeps the reservoir from bulging and twisting, ensuring a comfortable and natural feel as you move. The leak-proof design and quick-release valve make it easy to drink from and refill. Stay hydrated and focused on your outdoor pursuits with the Gregory 3D Hydro 2L Reservoir Optc/Blu.