Meh, I just wanted to use the opportunity to have Lily show off her powers a bit. 

EDIT: The thing is, I have to go to bed now, so I can't wait for Des to respond. So, here's what I'll do. 
> If Descartes decides that the glasses were full, Lily will help the waitress by lifting up all the liquids. This will not affect the glass shards, but it's a start?
> If Des says that the glasses were empty to begin with, Lily obviously will not be able to help with her powers.