Having finally gotten my printer to produce clean prints, I decided it was time to celebrate, which means making the obligatory shot glass :-)
I decided I wanted something reprap related, so I designed a shot glass in the shape of a hollowed out, tapered reprap teardrop.
Print, fill with your favorite alcohol, drink.
Actually, unless you coat it with food grade urethane first, I wouldn't suggest using it.
The walls are just a fraction more than 2mm thick, so I printed it with 2 extra shells, and an extrusion width of 0.424, which results in a filament spacing of 0.333, and produces a solid wall with no center gap.