"I did this one last year. I work at a restaurant. We have these spray bottles with a light pink solution we use to clean tables and such. I went and grabbed a brand new one and filled it with watered down pink lemonade.
I would be cleaning near my co workers , while chatting with them and nonchalantly unscrew the top spray/ trigger piece and just started downing it like I was dying of thirst.
The look of horror on some of their faces was priceless."