This is a carbon fiber core, aluminum 7050 baseball bat. It is light as all get out. Maybe slightlier heavier than a large water bottle as one cyclist noted. Alittle duct tape will mount a water cage to the base of your down tube. Make sure you can bend that water cage to fit. I'd stick with T-ball sized bats. They won't protrude so much past the headset that they will interfere with your turning. It's good to even pull it out and wield it behind your back for protection from a tailgating motorist who may decide to bump you.