Measures: 2.7 x 3.2 inch (W *L).This cup holder can store disposable cups with an opening of less than 2.36 inches. Packaging: 2 pack clear paper cup dispensers ( paper cups not include) ...

A few suction cups and some pool noodle foam will fix that. This video from youtuber Shake the Future shows you how to turn any typical paper towel holder into a more usable device for multi-taskers.