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November 19, 2012 05:07 pm PST
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/kUxMpPsXxJs/klein-bottle-bottle-opener.html
Klein bottle bottle opener
Yes, it's $72. But this 3-D printed metal sculpture/bottle opener is fantastic. And so is its marketing copy. The problem of beer That it is within a 'bottle', i.e. a boundaryless compact 2-manifold homeomorphic to the sphere. Since beer bottles are not (usually) pathological or "wild" spheres, but smooth manifolds, they separate 3-space into two [...]Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/kUxMpPsXxJs/klein-bottle-bottle-opener.html
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