There are tons of materials in Fallout 4 that you can collect and use to craft weapons, armor, and even furniture. Ceramics are one of the many junk items you’ll need to craft weapon and armor mods and upgrade your power armor sets.
Fallout 4 Fast Food & Quick Start Farming Guide | WikiGameGuides
While pottery is an easy-to-obtain junk item, the items that contain it are usually ignored when looting in the Commonwealth, so it's common to run out of them. Don't worry, though, because there are ways to get pottery in Fallout 4 very quickly.
Ceramics can be purchased or scraped from items you find in the world, just like any other junk item in Fallout 4. The best way to get ceramics is by collecting coffee cups and ashtrays, as you'll easily find them in large numbers in the Wasteland's dozens of abandoned homes.
Other items to keep an eye out for are teapots, vases, and bowls. These are less likely to be found while exploring, but they will net you more pottery if you scrape them. Here are all the pottery items in Fallout 4 and how much they cost:
