A mathematician confided
That the Möbius strip is one-sided
And you’ll get quite a laugh
If you cut one in half
For it stays in one piece, undivided!
– Anonymous via @ColinTheMathmo
A mathematician named Klein
Found the Möbius Loop quite divine
Said he, “If you glue
The edges of two
You get a weird bottle like mine!”
– Anonymous
The topological part of my brain
Finds Möbius strips quite a strain
But I make you this pledge:
I’ll glue one at its edge
And build a real projective plane
– RE
Any more? (Or can anyone give me attributions for the Anons?)
Simple City 
Pingback: High-brow limericks — The Endeavour
Asked the good Dr. Klein “What’s the fuss?
Regarding my bottle don’t cuss!
Just be very aware, storing liquids with care,
that what’s inside and out you don’t muss!”