Also plenty of traditional cold drinks that are savoury or can be savoury: doogh, ayran, lassi, jaljeera, buttermilk, kvass

I guess simply 'milk' I also missed, which is a bit sweet of course but I wasn't intending to lump it in with fruit juices and added-sugar drinks.

I did almost mention jaljeera, but thought that might be a bit niche. It is also often sweetened though. I've never known not-sweet lassi though? Salted lassi is still sweet underneath, like salted caramel, ime. We could count it with the sweet-ish milk drinks, anyway.

I’ll add legumes juices : both raw, fresh blend or the water from a soup that you separate and put in a fridge. Those are delicious.

Kvaas contain alcohol, doesn’t it?