Our bottle cages use a 360 degree contact area. This mean the bottle is supported completely. Ride some rough roads? Our bottles use several design features to eliminate bottles being ejected while riding. First we use a two tab system which allows the weight of the bottle to be distributed more evenly. This prevents tab breaking. 

Next we put two tiny "bumps" about a third of the way up the cage to help hold the bottle in place. Plus the front of the cage is not connected structurally but instead the two sides are held together by a rubber clamp. This lets the cage expand and contract slightly to keep a tight fit on your bottle. 

Finally the top of the cage curves inward which holds the bottle down. All of this adds up to a tight grip on your bottle. These cages would be ideal for someone who loses bottles often or is looking for a cage that holds their bottles extra tight.

These are sold in pairs.