No, it's not a reference. Yeah, I don't get it either.
This weird yellow guy is 3.5" tall with a 3" opening and can hold approximately 12 oz. On one side it features a pink inlay illustration of a hand holding a sliced grapefruit, and the other side has the words "KYLE that is a Grapefruit" on it.
Running ceramics through dishwasher cycles will severely shorten their lifespan, so hand-washing is preferred.