Check the listing for details. Gravity Stands Medium Drink Holder For Microphone Stands. Condition: New. Listed at 19.99 USD. This drink holder features a unique screw clamp that is adjustable for vertical or horizontal mounting options. It fits on mic stands, speaker stands and music stands with tubing diameters up to 1.4" as well as table tops and securely holds bottles, cans, cups and glasses with a maximum diameter of 2.75".