Compatible Size: Our coffee mug holder uses adjustable design for various sizes of mugs and glasses from 3.0 to 4.5inch. It solves the problem of limited shelf space in the kitchen and make them neat and orderly. Non-Slip Soft Rubber Design: Our cup holder uses the non-slip soft rubber design, so the coffee cups are stacked firmly together. You don’t need to worry about falling. Save Cabinet Space: Our drinkware stacker is the perfect gadget to stack coffee mugs. You can use them in any spaces, and arrange how you want to maximize your cabinets neatly. Display Uses: Our coffee mug holder can display glass coffee mugs, which is a great stacking utility and your mugs are completely safe in the kitchen cabinet. Easy to Use: Our mug holder is easy to use and highly decorative. There are 3 easy steps. First, place it on the mug. Then stack another mug, and finally squeeze both arms to fit the mug.