Stamina Extra Tonic in the larger 1.5-litre bottle is a potent Caribbean herbal drink from the Fieldsway range — a step up in herbal intensity from the standard Stamina Conqueror. The flavour is dark and root-deep, sweetened just enough to be drinkable while keeping the assertive botanical character that distinguishes it from a mild bottled drink. Drunk chilled, in small measures rather than full glasses. The 1.5-litre size is the family or stock-up bottle. A Caribbean tonic for drinkers who already know and appreciate the stronger end of the herbal-drink spectrum.