oldMohawk
gone but not forgotten
I did use the 'Solidfy' command at some stage. I think the problem is that I started the handle 'Spin' extruding from the top to the bottom which was nearer the world centre than the top. When I cut the cup in half, the walls and base are solid ... it's just the handle which is hollow. Something for me to puzzle out sometime ... but I'm in the real world today!