They are similar in design to ones I’ve seen from India. Are there any markings on the bottoms? The opening is pretty thick-walled. Makes me wonder if they had caps or stoppers originally. The ones I’ve seen were in the $5 to $10 each range. But these could be different.
I'm not good at telling asian dragons apart, but if you can take better details pictures it would be great. I can see a boat with possibly an Oni figurehead and the dragon might be the top of the sail...