Bike bottle cages - MTBIKER.shop

Materials: Aluminium, plastic, carbon fibre, stainless steel.
Advantages: Lightweight, simple, versatile.
Disadvantages: Less stable when driving aggressively (on cheaper models).
Suitable for: Road, city and trekking bikes.

A bottle cage or bottle rack is a bicycle accessory that is used to secure a water bottle or other beverage bottle so that it is easily accessible while riding. It is usually mounted on the bicycle frame (most often on the down tube or seat tube). The cages are designed to hold the bottle securely even during rough terrain, while also allowing it to be quickly removed and reinserted.