Do you intend to put liquids in it after a repair?
If not, then some superglue should work. Get the liquid kind, not the gel kind.
The last time I did this on ceramics, I dry-fitted everything together and held it in place with small pieces of blue painter's tape. This took some time to get things exactly right, much longer than the open time of the glue, if I'd been using it.
After everything was dry-fitted the way I wanted, I then dabbed tiny dots of superglue along the breaks on the inside. Surface tension draws some into the crack, and the rest you can clean off a day or so later. I'd do a few dots farther apart, let it set, then do more dots in between, double-checking the fit was still good. The early dots help hold it in place for the later dots.
I'd do the same dot-dabbing on the inside for any cracks that didn't break completely.
The way I determined whether the dry-fit was good or not was by running a finger over the break. Sometimes that would show a misfit much better than a visual check.
If it needs to be liquid-proof afterward, that's a lot more difficult, and I really don't have any good suggestions.
