Freak your house guests out with the Hidden Surprise Mug. This semi-disturbing mug will definitely have your friends' stomachs churning. The gross design comes from Urban Outfitters and can be found online or in store.
The Hidden Surprise Mug does indeed have a surprise waiting for people at the end of their drinks. The surprise at the bottom is very much inspired by child-like humor. Once guests finish their drinks, they'll find a twirly lump of poop waiting for them at the bottom.
This is definitely one fun cup to prank unwanted house guests with. However, if you're just looking to add some humor to your life first thing in the morning, then this is the cup to do it with.