This is a legendary passive-aggressive move right here.
A woman on Twitter named Angela Brisk just posted her method for sticking it to any guests she has over to her house who she doesn't really like. It's not clear why she's having people over who she doesn't like, but that's not the point.
Angela boils some hot dogs . . . then pours the water into an ice cube tray and freezes it. So when she's making drinks for the people she doesn't like, she uses the hot dog-flavored ice.
(Here are some pictures of her method.)