Skyberries and Voidmelons or Voidberries and Skymelons

Donald A. Norman's The Design of Everyday Things is popular in my class, and on the front of the book is a picture of the Masochist's Coffee Pot (designed by Jacques Carelman and featured in A Catalogue of Unfindable Objects). I also came across Objetos Imposibles, which also features some strange designs, such as the cactus glove (a glove with spikes on the outside) and the weekly pipe (seven pipes attached together, one for every day of the week, and it smokes seven times more slowly than a normal pipe). and glasses specially designed for gazing into another person's eyes.