JUNSUNMAY Bike Cup Holder Cages Bicycle Water Bottle Aluminum Alloy Bracket 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 holder will keep your bike secure. 3. Easy to Install and Free Tools: Easy to install and remove, can be 180 degrees rotation (rotation base type). Free installation tool and complimentary screws. 4. Wide Application: You can place it virtually anywhere on your bike: handlebars, highway bars, seat posts, or other locations and it also fits most motorcycles, MTBs, walkers, and fishing umbrellas. 5. Bicycle bottle cages fit most standard-size water bottles, cups and beverage bottles.???