Salt/pepper shakers in shape of TARDIS and DALEK. For practical purposes (printing, and use) the DALEK does not have the usual accessories (weapons, eye stalk).
Each is hollow, has a hole in the top, and a screw fitting in the base.
You'll probably want the TARDIS in blue, but not sure what colour to make a DALEK :-)
I drew these in OpenSCAD but obviously the BBC have rights over both, so you can't really sell them.
I run an ISP, but we do 3D printing and laser engraving and photography and all sorts.