Designed for bigger insulated cups, plastic water bottles or even a steel coffee cup. Includes an XL Level Cup with an integrated Touch-Claw Toolless removal and adjustments on any rail or flat bar Can be attached to any surface from flat to 1.5" railing Oversized opening cradles the biggest of gulps Adjustable bottom piece moves up and down to accomoate taller cups Rubber feet flex to fit various sized cups Self-leveling keeps your cups full