I’ve found a new job and have been working there for around 3 months. One of my coworkers, a man in his fifties, has been playing small pranks on me, which were mostly harmless. Recently, however, he decided to mess with my water. When I came back from lunch and took a sip, my water tasted weird. When I opened the bottle, white foam fizzed up. I was disgusted, and then he broke and started chuckling. Apparently, he put powdered coffee creamer in my water, and many of the people around the place seemed to be in on it. I think he’s done it to them too. I really don't want to go to work tomorrow.