Acme Klein Bottles is an online purveyor of elegant glass bottles with a twist – literally. These bottles are crafted to curl inward so they actually “exist within themsleves,” basically Mobius loops rendered in glass. The majority of the customers thus far have been mathmeticians, but they look pretty cool as sculpture (especially the sliced bottle) or you can have them engraved. Further continuing this theme, the site also offers Klein beer steins and Mobius scarves.