Generic for concentrated bitter tincture of herbs, spices, fruit, and spirits. Deemed too bitter to be consumed by themselves, they are normally applied to any beverage in dashes or small fractions of an ounce or mililiter. Though containing alcohol up to 80 proof, manufacture was allowed without restriction even during Prohibition, because the bitterness was such that the Internal Revenue Service, who administered compliance with the National Prohibition Act, termed it "non-potable alcohol" ie, too bitter to consume straight.
Generally available. Distributed world-wide. Available for on-line ordering in some markets.