Help Making a Tapered Cup In Inventor

Hey all. I’m trying to make a cup in Inventor. Most cups taper from a smaller bottom, to a bigger top. I tried to use an extrude taper, but the material got thinner as is went up. It eventually just ended in a point. So I want to know how to make a shell, that tapers without the walls getting thinner. Any help will be appreciated!

Kinda in a rush, I’ll post pics of what I’m trying to do later if necessary.