Specifically designed for dorm rooms, College dormitory bed, lofted beds and cribs..Humanised Design - for bedside water. Keeps water bottle on the top bunk, hold water on the bedside, stop getting out of bed at night for a drink. No need to worry about water falling or spilling. Put it in your son, grand daughter, or daughter's bed, can get her own drinks at night. Changed your lives and improved the of your sleep.Sturdy Steel Material: This metal cup holder is made of 304 Stainless Steels, smooth surface, very sturdy for storaging heavy cup/bottles weighing up to 22 lb, can be used for a long time, not easy to deform, more and solid than plastic drink holder.Universal - Work with most bedframes, ensuring a tight fit. college bed frame for bedsides, bunk bed, crib rail, bed, daughters metal bunk bed rail, ' lofted beds, headboard, sleigh bed, lawn chair, boat bed, raised dorm bed. Before purchasing, please check the size and whether it is suitable for your use. Clamp-range of bed rails: <1.37in.Practical Design: Diameter: 4.1IN, Height: 3.3IN. It can hold most sizes of cups, mugs, glass, drink bottles, cans, tumblers, etc. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.