With Rotation Base JUNSUNMAY Bike Cup Holder Cages Bicycle Water Bottle Aluminum Alloy Bracket(Blue)1. With Rotation Base Type: JUNSUNMAY Cup Holder With a handlebar mount bracket, gives you 2 way install choice, you can install it on the bike frame, and mount on the bicycle handlebar or seat post by bracket. very practical and convenient, it is equivalent to buying two different bottle cages. 2. Aluminum alloy material, lightweight, durable. There is no need to worry about it falling during your ride. The smooth surfaces of the bicycle bottle