#brain bender

[ruinedholograms]

(1991)

[ketchuplaser]

[mysteamgrids]

Brain Bender

[gforgrace]

philosophy bends my brain

[theswindlr]

Prepare to waste at least 3 mins trying to figure this thing out. It is called the "Klein Bottle" and has no inside nor outside surface, what is more you can actually fill these with fluid.

Here's how