Camping Hiking Cycling with 2.5L TPU Mouth Water Bladder Bag Water Bladder Bag can be used to store water with -20 to 50 degree Celsius.? Foldable design, easy to carry. Product Description Features:? * Brand New and High Quality Safe non-toxic TPU material.*? Compressive resistance to abrasion. Can be put into backpack and backpack's shoulder strap. Can be used to store water with -20 to 50 degree Celsius.