
The above cufflinks are made from spirit-levels! The fun you can have with these at the local pub is, quite-possibly, endless - Whoever can't keep their drinking-hand level takes a swig!
That aside, they're designed by artist LeeAnn Herreid, and you can grab them for US$80 Here.

These ones are hand-made (supposedly) from genuine watch bits and each one is unique. Can't find who designed them, but you can pick them up from Here.
Cheers,
Pip