Lol, why food? I only meant for water and hot liquids like lava. I hadn’t considered piping something like juice. Glaze would be great, I’d like lacquer too but sometimes you need to forgo a little realism for playability.
If you are looking for an easy way to glaze, stoneware can be glazed with shells or ash, ash is used in clay in kilns to glaze pottery and we get a lot of ash from burning boxes. That starts getting into all sorts of kiln bother though. Did you know I wanted a glass furnace? A pottery/glass kiln sounds fun. I converted Et Futurum’s blast furnace into a kiln since it can’t smelt metals anymore. Changed its recipes to glassware and clay only.