This bicycle cup holder is designed to fit a variety of cups and bottles and attach to a bike handlebar or basket. You can put cups, bottles, cell phones or cans in without worrying about fit, stability, or anything falling through. The cup holder attaches with 2 snaps and can also be taken off and attached to your belt like a beer holster. My bike holster can also be pushed through a weaved basket as well. Visit my shop for more colors and models. Thanks!