Never enough lidded pots in my estimation. It is quite a challenge to come up with a new but functional shape. Fitting lids does not seem to be a problem with stoneware clay but porcelain seems to be another issue. Even though I throw them at the same time and the lids fit fine, the next day when all is leather hard, the bottom has shrunk more than the lid. I think water content may be the issue. Anyway, these pots are fired at cone 5/6 ox. with c.w. cream over c.w. plumb glazes (ceramics arts monthly). This glaze combination never disappoints but it does surprise...usually a good surprise.