This is a Klein bottle wine bottle, which, although in four dimensions it shouldn't be able to hold any fluid at all, it's perfectly capable of doing so because our universe has only three spatial dimensions.
Aceasta este o sticla de vin Klein, care, desi intr-un univers cu patru dimensiuni nu ar fi capabila sa retina nici un lichid deloc, reuseste totusi acest lucru pentru ca universul nostru are doar trei dimensiuni spatiale.