Using the E - Trunk is a breeze. First, use the Top - Lock adapter to attach it to your e - bike. The setup process is quick and easy. Once it's on, you can start packing your stuff like clothes, snacks, and a water bottle in the spacious 10 - liter storage area. When you want to take it off, just give it a 'click'. As for the bottle mount, you can easily place your water bottle there. When it comes to safety, don't forget to attach a rear light to the dedicated space and make sure the 3M Scotchlite reflector is clean for better visibility. To maintain the E - Trunk, clean it regularly with a mild soap and water. Avoid using harsh chemicals that could damage the waterproof material. Store it in a dry place when not in use.