The teardrop toroidal

Must say I am a bit confused about this one as if you look for images on regular search it’s all the rings and donuts 🍩 - yes I know about those thanks 🙏🏻 so what is this other shape? It’s sounds familiar in a way distorting space and time but they were geometric shapes that usually twisted space and time into spirals, the tear drop doesn’t ring a bell 🔔?