Our water bottle pouch is designed to fit most bottle size, big and small, with the adjustable strap. It stays on your bottle perfectly and won't slip. Our water bottle bag has three zippered pockets, the middle one is a phone holder, and the another big pocket in the back, and small pocket in the front for keys, cards, headphone, and other small items storage. Zipper compartment to keeps your phone secured. Our gym water bottle pouch can keep your personal items off the ground and free your hands while exercising, making it a great gym accessory gift for your water bottle.