Fit Most Water BottlesThe water bottle strap (tumbler not included) compatible for Stanley Quencher, IceFlow, Adventure tumblers, Ozark Trail, RTIC, Simple Modern, Owala, reduce, YETI, and gym water bottles. Its elastic strap can be adjusted to accommodate various sizes of water bottles, which can be used in 20 oz-64 oz water bottles. Powerful MagnetThe magnet is very strong with a magnetic force of 3053Gs and your phone will be hold completely steady. Don't break your phone accidentally! It's perfect for freeing your hands and holding your phone while working and exercising! Two Metal RingsWe provide two metal rings to connect to your phone. If your phone is a compatible for MagSafe device, you can directly connect the magnetic water bottle strap. If your phone is not compatible for MagSafe , you can attach the metal ring to your phone and connect it to the water bottle strap.The magnet is really powerful, especially if you have metal rings added to your device. Secure and SteadyThe water bottle strap is made up of synthetic fiber and elastic rubber, which is flexible to fit different sizes and has a certain skid resistance to keep the strap from sliding.The disk is made of ABS material with a built-in powerful magnet that ensures the phone does not drop even when you knocked the bottle over.