DRINKHERE Aluminum Bottle Cage Adapter $14.89Rated 4.70 out of 5Wanna place your bottle with handlebar or seat post of your bikes? “DRINKHERE” helps. Easy to install and easy to adjust. You can install the bottle cage with a 3mm and a 4mm hex wrench. You can turn the body for 90 degrees or 180 degrees to fit your handlebar or seat post.It will not only helps on carrying more bike bottles. With it you can enjoy mineral water, can of Coke, coffee…easily. EXNTENDER BAR User Guide