The intriguing subject of these cryptic entreaties is a bizarre mathematical object known as a Klein bottle, discovered in 1882 by German mathematician Felix Klein (1849-1925). An ordinary bottle ...

Calvin Klein is delivering a message in a bottle – a really, really big bottle. His fabled fashion house plans to erect a three-story-tall display in Times Square that looks like a perfume ...

Meet [Cliff Stoll], producer and entrepreneur-extraordinaire of the ACME Klein Bottles. Years back he helped a friend program a glass oven to get the right temperature profiles for glass blowing.

But that’s OK because Cliff now sells Klein Bottles, “a one-sided surface which, if traveled upon, could be followed back to the point of origin while flipping the traveler upside down ...

It specializes in winter headgear: Klein bottle caps and Möbius earbands, each available in several different colors (one side fits all). Although I haven’t actually tried these particular ...