Hood Nurse:"Dude. This has definitely been in there a while. There seem to be rings forming around it. And there's like, a film on it, see that? What would you say, that has to have been there for like, at least 4 hours, right?"
Emesis Bag Nurse:"Four hours? No way. That's way under. It's pretty obvious she must have dropped that when she heard Whitney Houston died last night and it's been there ever since."
When in doubt, guess high.