That there is the Klein Bottle, first conceived of in 1882 by German mathematician Felix Klein. Klein's "non-orientable surface," as it's called in the math community, is like a Möbius strip in that you cannot distinguish inside from outside; follow it with your eyes and you'll see one turns into the other, which makes me very, very uncomfortable.

I'm told that the Klein Bottle is, in essence, two Möbius strips connected together. I'd like to start sketching that to work out how it goes together, but I can't because I'm too stupid.

Scientists have not yet figured out how the Klein Bottle will enable the design of time machines, but it seems obvious that it will be a crucial component and that scientists are simply lazy. In the meantime, you can purchase a Klein Bottle for yourself. Astronomer and famous hacker hunter Clifford Stoll's company, Acme Klein Bottle makes them, including this wine bottle that moves the spout up to the top:

I love Stoll's brutally honest product description:

The chimerical Wine Bottle Klein Bottle is now reality! As impractical as it is elegant.

The Wine Bottle Klein Bottle is difficult to fill with wine, because of vapor-lock. As you pour water (or wine) into it, there's no place for the air to go. So the wine is trying to go down while the air is trying to go up the spout. Result is slow filling. Pouring wine out is equally frustrating.

...Not only are these difficult to fill and empty, but cleaning them is a real challenge. Since there's little air circulation within the Klein Bottle, moisture doesn't evaporate. Worse, you can't reach in with a towel. So you'll need to dry the interior surface using alcohol. I've had good luck with a pair of small magnets wrapped in cotton cloth.

I've designed these to balance with or without contents. However, they're easy to tip over, especially when empty.

Again, these are about the most impractical Wine Bottle / Caraffes ever made. But what's life with only utility and efficacy? Living without spontaneity, risk and danger? Besides, what else costs under 100 clams?