I couldn't stop laughing at the end :D It's a good prank.

I'm doing this. I work at a coffee shop.

Your office mates won't be happy :D

should try that

it wouldnt show it to me :(

yeah, mine doesn't work either

heheheee +3

I've done this with a regular glass of water once. Everyone could see there was water in it and wondered how it got like that. My family kept arguing over who would mess with it and attempt spilling it's contents all over the table and floor. It was pretty funny if I do say so myself.

fuuny, but mean :/