It is actually a morph of a Klein bottle.
A Klein bottle is a conceptual demonstration that a three dimensional object can have a connection between its inner and outer surface that causes it to have a single surface over its inner and outer parts.
This is to a torus or a coffee mug as a Mobius strip is to a paper sheet.
When I was 14 or so I discovered these and made one of paper , the type I made was kinda fun for me , but I totally failed to explain it to anyone .