Food Type Help

[Sodarrific]

I've looked through numerous topics and guides including this

However, I can't find anything relating to adding already existing food into a food type.
My goal here is to make a food type consisting of liquid food (electric milk, bone bouillon, asparagus soup, etc.)

GLOBAL.FOODTYPE.CAVITY="CAVITY"

How do I go about doing this?

Edited January 24, 2022 by Sodarrific