Using the Ampd Bros Captain Cup Holder is simple. First, decide where you want to mount it - it can go on handlebars, seat posts or frames. Then, use the quick - release clamp mechanism to attach it firmly. Just open the clamp, place it on the desired spot and close it. You can rotate it 360 degrees to find the most comfortable position. When it comes to carrying items, it can hold 600mL bottles, 375mL cans and other similar containers. For maintenance, clean it regularly with a mild soap and water solution. Avoid using harsh chemicals as they may damage the cup holder. If you're not using it for a long time, store it in a dry place. Also, make sure the clamp is tightened properly before each use to ensure your bottle or cup stays secure.