r/Pottery • u/Pollymath • 1h ago
Question! Consistent Inner-Diameter Shot Glasses
I want to create a series of ceramic cups and vases, roughly the size of shot glasses, that all have the same inner diameter - 1.25" and depth - 2.50".
The exterior shape will vary, but the interior must remain consistent after firing. I know it will take some trial and error to nail down the shrinkage, I may need to plan on a 1.5" wet ID in order to get a 1.25" fired or glazed ID.
My first thought was hand building around a DIY Mug Plug, but I feel like at this size it's going to be a lot of work to join the seams and build the bottoms.
Alternatively, could I ball some clay around a plug or form, throw it on the wheel, shape the outside, then pull the plug? Something akin to a Jigger, Drape or Hump Mold?