My Clarice cliff jug

I got this Clarice cliff jug at a second hand shop I only paid 50 pence. I have all ways wonted to own a piece of Clarice cliff .this is the only bit that I have came across .over the years. From what I could find out is that Clarice cliff was 16 when see went to work for Wilkinson .if any one could help with any other information would much appreciate it