Doktor Avalanche
I thought it was a tool that made sure the skins are perfectly levelled with the ground. So drummer can leave beer bottles without falling off.
Nicely done. Mind you, any drummer really worth his or her salt can balance a beer bottle anywhere. Top of the head, end of a stick, on the left elbow while doing a one-handed press roll with the right, you name it.
Plus, don't they all have holsters that clip onto the hardware somewhere? (mine is refrigerated, which is a nice touch. it's even bus-powered. meaning, I charge it on the bus...)