[Toffle]

Aperture rings are held on with a Haagen-Dazs ice cream carton rim.
...

Reinhold

www.classicBWphoto.com

This is exactly what I'm talking about! Pure innovation. No need to stalk the plumbing aisles at the hardware store when we can reuse/recycle from our own trash.

Every once in awhile I hear mention of Alexander McKay, who ground his own lenses out of the bottoms of whiskey bottles. (of course, in my case it would mean changing brands, but I might be willing to make a sacrifice... )