The Klein Bottle Opener
“A theorem walks into a bar…
The Klein Bottle Opener is a mathematical joke: a surface with only one side. This one feels just right in your hand and opens bottles with ease and style. Built to last in steel, it’s the perfect touch for any math fan’s kitchen.
Yes, it really works!”
-Bathsheba
design by: Bathsheba
source: https://www.shapeways.com/model/321931/klein-bottle-opener.html
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