That’s what I was thinking. I’ve been using cinchona bark for a year and a half now to make tonic water.
Wow...you make your own, with the bark? Nice!
We have quinine tincture that we make our tonic water with...I add a drop of stevia drops....tastes 100% better than the horrid diet tonic. (Regular tonic water is too sweet, for us.)
Fevertree makes a light version of tonic, but we still like our homemade version a lot better.