Yesterday this facejug was on Dutch television. I would like to add and correct a couple of things.
The historian in the show doubts that the jug was found in an Amsterdam canal. I would say it’s not unlikely, since many comparable pieces have been found in Amsterdam (including the one I own myself).
The production region of the “puntneuskruik” is Aken and Raeren. The jugs were often made with a pinched foot, but a flat base wasn’t particularly uncommon. Comparable facejugs are usually dated between 1470 and 1550. I wouldn’t dare to date a piece more specifically without a finding context.

I understand that the experts in the show have to know a lot about a huge range of items, so these remarks are not meant as critique.

You can watch the show here. The fragment with the facejug is 15:53 – 20:25
https://npo.nl/start/afspelen/diverse-musea-1_22