PDW Rattlesnek Kej Water Bottle Cage - Desert Gold Right OpeningPDW Rattlesnek Kej Water Bottle Cage Copper Right Opening. The Rattlesnek Kej is made from a single sheet of lightweight 5052 alloy. Its sinuous body puts the squeeze on your water bottle while diamond cutouts reduce weight. Side entry design works well for all frame sizes and because the Rattlesnek Kej is available with the opening on either left or right you access bottles from the same side when you have Rattlesneks on both the downtube and seat