Using this water bottle carrier bag is super easy. First, put your 40oz tumbler into the main part of the bag. Then, you can store your phone, keys, ID cards, and bank cards in the detachable pouch or the small pocket. Adjust the strap to a comfortable length according to your body size, and you're ready to go. When it comes to maintenance, you can use a damp cloth to wipe the bag clean. If it gets really dirty, you can hand - wash it in cold water. Just be gentle to keep the fabric in good condition. Remember, the color of the actual item might look a bit different from the preview images because of the lighting during the photoshoot or your monitor. So, don't be surprised if there's a slight color difference.