of klein bottles and "atomic" clocks....

a few months ago, oren and i received these glasses from one of my high school teachers (a Conservative rebbetzin) as a belated wedding gift. a Few weeks ago I finally toveled them and have since been using them a lot. (We were actually low on glasses...)
I really wonder who thought of the glasses, and who buys them. I would guess that "frum people" is not the answer to either. I would further guess that they are a common gift from moderately affiliated people to their "frummie" friends and relatives. But they're still fun. If a bit odd.
On the subject of funny wedding gifts, the most useless, but perhaps most amusing, was this.
One of my personal favorites was the atomic clock.
I originally registered for it because they have them at Drisha and I thought they were cool. Particularly when they reset themselves: seeing clock hands move spontaneously around the face of the clock multiple times per minute is rather amusing, if eerie...
What I did not know at the time was that our atomic clock would have a special habit of resetting itself to 3 hours 45 minutes slow every Friday, and then correcting itself by Monday morning. Again, amusing, if not useful. Actually, it took me a few frustrating weeks to figure out that there was a method to the incorrect timing, but now I think it's endearing...
I don't know what the point of this post is. Ideas for all out there who are in the market for inexpensive fun gifts around this time of year (or another)...