Anamorphic Cup and Saucer.

Lazybones sells teacups, coffee cups, and "your own logo" cups in classic anamorphic style. The image on the saucer is distorted, and the cup reflects a corrected image:

[Anamorphic] refers to a distorted image that only appears
normal when viewed with or reflected from a
special device. The most common of these devices
is the anamorphic cylinder, which typically
consists of a cylinder with a highly reflective
surface, placed in the center of painting that
is lying face-up. Such curiosities first appeared
in the 1600s, and became popular throughout
Europe in the 18th century.

Here is an eighteenth-century anamorphic painting of a ship: