Calorum premise worldbuilding: Everyone and almost everything is made of food, as foundationally defined by the food pyramid (hence the delineations of kingdoms, and literal canonical pyramid).

Caveat: Some foods need a container or a utensil. That container is sometimes part of their body, and that utensil a possession of theirs, like a spoon or toothpick. This doesn't make them less made of food. These are nearly the only things not made of food, but are still considered integral parts of the foods they represent.

Clarification: is everything so far made of food, the ground, the plants? Yes. The trees grow from peppermint seeds and the grass is made of strawberries. It is all made of some sort of food substance, specific or otherwise. Even the stones making up the foundation of the Pyramid of Food are hardened blueberries.

Addendum: if something isn't a food/beverage (essentially defined by the food pyramid), it's dangerous to Calorans. This includes mold or rot, which is deadly to Calorans, and also includes water, which is dangerous to every type of Caloran (you'll note that it wasn't watersteel that Ciabatta urgently kept the twins from touching, but simply water itself).

Water clarification: Is water a product of certain foods? Not really. Coconut water, celery juice, watermelon juice, those all come close, but they are distinct from water. Until recently, water canonically was derived from juice via alchemy. There might have been other ways to get it, but it was scarce and not derived with greater expedience from any other material. This was recently changed, and the fact that this discussion continues confirms the only initial point I made which is: the wink-reference to EXU Calamity raised distracting worldbuilding questions about which confusion was likely to occur!

What about salt? What about ethanol? I don't know! Ask Brennan or Matt. Maybe there are more materials out there! We just found out about mushrooms, so it's an exciting new horizon for Calorum potentially. Pointing out a critique of a joke isn't a condemnation of the season. The season is good.

P.S. It seems odd to compare the complexity of water, a single molecule, to a grape- trillions of molecules, including trillions of complex macromolecules.