The All Black Bike Cup Holder features a black potyurethane skin, stiched to a black polyprophylene cup holder Bike nlastic side mount with hex holt（4mm）fastener The inside of the cup has tabs to keep your drink tight over them bumps. Our bicycle cup holder can be mounted in front of the handlebar or behind (photos show front mount) Normal 12oz cans and bottles will fit nicely along with coffee cups, plastic cups, keys, phone, wallet...ANYTHING