Better bajonet lid for money banks

It is suitable, for example, for a piggy bank from original author: https://www.thingiverse.com/makerbot/designs

I proposed it because the popular "pig money bank" has a plug or hole for it that is very difficult to press and supports cannot be used. Especially with Piggy banks, the cover often fell inside when closing.

It is a good idea to print the full material separately and just glue it into the final product.

Basically, this has a 38mm outer diameter and even a 50CZK coin (27.5mm) will pass through it well.

I've done a few unpublishable versions, this one is pretty cool. Next I assume there will be a key to open it and som improvements.