Using the Topeak TriBox Fastfuel is easy. First, decide how you want to mount it. If you have a triathlon bike with built - in mounting bosses on the top tube, use them to attach the case. For other bikes, use the two secure scratch - free straps. You can choose from 3 different mounting positions to find the best fit. Open the large opening to put in your energy bars, gels, or other energy items. When you're riding and need a snack, it's right there for quick access. Remember, the shell is designed to let cables run through, so don't block that path. As for maintenance, keep it clean by wiping it down with a damp cloth. Avoid using harsh chemicals that could damage the TPR or the 3M™ transparent protective film. Also, make sure the straps are tight and in good condition before each ride. And always check the fit on your bike's top tube to ensure it doesn't move around while you're riding.