I'm sure you have all seen the photoshopped picture of the Zoom Lens Coffee Mug. I thought it was a ridiculous idea but deep inside I wanted one. How hard could it be to take the optical glass out of an old lens and put in a drinking glass. As it turned out, not that hard at all!
Now you can make your own. But don't stop at something that looks like a zoom lens, make one out of a real zoom lens that still zooms, focuses, and changes aperture. In fact, with the lens cap on, no one would ever know!
Seriously, please let me know what you think, ask questions, post pics of your own conversions, and if you like it, rate it!
Step 1: Find a Lens
Bigger is definitely better in lens cups, so a big long zoom or telephoto, especially one with a large front lens will make a generous coffee cup or cocktail glass, but you could make shot glasses out of 50mm lenses (if you can find a shot glass that will fit).
The one I found was around NZ$5 and was a Star-D brand 80-205mm f 3.8 lens. I wanted a bigger one but I didn't want to spend too much before I knew whether it was going to work or not.
I also like the old 1-touch zooms (same grip zooms and focuses) so it seemed like a perfect "doner" lens.