Convenient Storage: There are pockets on the left and right straps that can store 16.9 fl oz (500 ml) plastic bottles. There is a pocket on the side of the main pocket to hold your phone or personal items. Enjoy listening to music while jogging. Compact and ready to go. You can store other accessories other than water on holiday days and enjoy them when you are trekking, camping, outdoor festivals, bicycle riding, fishing, winter sports, personal running, cycling, jogging, and other outdoor activities. Note: This product does not contain hydration