Weed soda?

Yes, in England.  Fentiman's produces a soda made with dandelion leaves (Taraxacum) and burdock roots (Arctium). It is apparently a traditional English favorite.  I will have to ask my UK friends about this.

They also have Ginger Beer that includes yarrow (Achillea) and their Orange Soda has speedwell (Veronica) in it.  Gloriously weedy, indeed.