That’s a Kline bottle I believe
@TriangleTesticles, I’m gonna stick my djck in it
@TriangleTesticles, I wonder if anyone ever attempted to use a Kline bottle as a plant pot.
@A Deformed Penis, but it's a one sided object *gasp* where's the inside!?
@TriangleTesticles, ‘‘tis indeed a Klein bottle. The shape of space!
@Professor Rokferbranes, Matt Parker from Numberphile had his mom knit a striped snow cap as a Klein bottle, in which the length of each stripe represented a digit of pi.
@Appull, we all already have our djcks inside of it and outside of it
But a smart man will look at one, add one sciency equation, then bing bang boom, you got time travel.