Handmade Glass Klein Bottle

Wrap your mind around a true topological wonder! This handmade glass Klein bottle has only one side, zero volume, and absolutely no boundary. It is the ultimate mind-bending desk toy for math lovers, physics nerds, and programmers. A guaranteed conversation starter, and 100 percent free of magnetic monopoles.

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$89.00
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Quack up your typing game with Duckeys, the adorable keycap charms for your keyboard! Swap out that plain old keycap for a Duckey…

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$14.00