The Sport Bottle Cage is basically a modified, nylon reinforced plastic version of a Dave-O. Arundel are not trying to make the lightest or the craziest looking of bottle cages. They are trying to make this thing work exceptionally well and look good whislt doing it. Sport cages weigh only 50 grams and are as tough as nails. They will hold a bottle well in any condition and any application. The cage fits like any other with teh Bottle Boss mount. The dimensions are such that all brands of bottles will nest securely and still be easy to get to.