Pls add Kombucha!
Kombucha is a fermented, slightly alcoholic, lightly effervescent, sweetened black or green tea drink commonly intended as a functional beverage for its supposed health benefits.
I think it will be an excellent drink to remove the presence of a huge amount barrels of tea and if it will heal a concussion, because slightly alcoholic (another way to reduce hard-to-reach medicines such as snow and opium).
Boiled tea as main and any sweetener (or trees sweetener for harder obtaining), fermentation as wine and further into vinegar.