fake news, percussionists are too busy fucking off in the back of the band room to notice the glass of water

Ew, trumpet gravy.

Ok, can someone explain the violist cup?

Huh, bassoon reeds look pretty similar to bagpipe chanter reeds! Cup would prolly be half full of beer or whiskey though tbh.

There is one more way to get sound out of some glasses other than percussion.

I like your meme op. I have no notes.

And for Germans there clearly is not enough alcohol in the glass.