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 whats inside.

Wall thickness is 1mm so if you scale this down to print you may have issues.

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/4JaNvKBYxOW