Using this water bottle carrier bag is a breeze. First, place your 40oz tumbler or water bottle into the main compartment. Then, you can put your phone, keys, ID cards, and bank cards in the detachable pouch or the small pocket. Adjust the strap to your preferred length so it fits comfortably on your body. When it comes to maintenance, you can spot - clean the bag with a mild detergent and a soft cloth. Make sure to let it dry completely before using it again. Remember, the color of the actual item might look a bit different from the preview images because of lighting during the photoshoot or your monitor's display. So, don't be surprised if there's a slight color variation.