Klien Bottle

I found a few other Klien bottles, but they proved problematic when it came to slice them for printing so I decided to see how easy it would be to design one myself in tinkercad.. not so hard it seems.

What is a Klien bottle? It's a closed surface with only one side, formed by passing one end of a tube through the side of the tube and joining it to the other end.. a 3d mobius strip.. trying to figure it out is a bit mind bending.
I have uploaded the bottle in 2 halves as well so you can see