I always throw the body of these big jugs seperately from the neck. First of all, it allows me to concentrate on the curve of the body. It's also difficult to reach inside to the bottom of the pot when it gets tall - dropped a sponge in one today and couldn't reach it to get it out.
When I'm happy with the shape, I give it a blast with the gas burner to toughen it up.
The neck is then thrown to the right size on the adjacent wheel.
The neck is place in position and joined on the inside
The outside is smoothed in
The join is consolidated with the aid of a rib and the neck thrown to its finished shape.
The lip is pulled
Job done
And here's the other one I made too.




















