What does the water bottle strap apply for?This water bottle holder for cell phone is a must have item for outdoor activities. You can put the water bottle phone holder on your gym water bottle when you are doing workouts. It can free your hands keep your personal stuffs away from the dirty floor. With high quality material and detachable design the water bottle phone holder can bring you a comfortable Gym workouts experience.What are the advantages of our water bottle holder for mobile phone?♥ Multi-functional for Gym workouts and other outdoor activities.♥ 360° rotating and detachable silicone phone holder.♥ Freely Use Face ID & Touch ID♥ Fit for Most Phones of 4.5-7 inch♥ Adjustable for 18-40 oz/diameter 5-9cm water bottles♥ Free your hands when doing workouts♥ Anti-slip design never fall off.♥ Hidden pockets for cash or cards♥ A carabiner for keys♥ A mesh pocket for earphonesWarrantyIf you have any questions please feel free to contact with us we will get back to you within 24 hours. Any defective product we can arrange a replacement for free.