Having a cup holder that will attach to a microphone stand is a great idea. I have always wondered how singers and musicians keep something, to quench their thirst during a performance, without it spilling some how. A spill could mean damage to most musical instruments, some thing that could put an instrument out of commission for a good while, leaving the owner to either wait it out or buy a new one. Either way, money would be lost.
Musician’s Gear Microphone Stand Cup Holder Black Universal Clamp