The main part is "SunkenCoffeeMug_Top", but the snipped off bottom,
as well as the complete mug, for reference, are available too.
The bottom part comes in two different versions, a "even more
sunken mug" and the original, snipped bottom, rotated for
direct print.

The image shows a 60% size printout.
I really tried hard printing this at 100%, without any
support, but I failed.
The handle itself does not provide enough stability.
Because nothing else helped, I added a custom, 100% fill
raft under the handle.

But still, above 4-5cm, the handle tends to warp up and the
printing head kicks it from the platform.

Anyway, at least my children like it ;-)