A basic background is thus:
The word shrub comes from the Arabic sharaba meaning 'to drink.'
The first reference to 'shrub' in the English Dictionary comes in 1747 and is defined as 'any of various acidulated beverages made from the juice of fruit, sugar, and other ingredients often alcohol.'
So I started making my own shrubs today. I'm starting out with one from strawberries and one from cherries. Now, as the article link states, they have focused on alcoholic shrubs. I am making non-alcoholic shrubs using apple cider vinegar.