Produced in France, Giffard Elderflower Alcohol Free is made from a maceration of hand-picked elderflowers in white wine vinegar. It contains water, sugar, elderflower infusion, concentrated lemon juice, natural elderflower and other natural flavorings.
It is indeed restrained in sweetness, and the vinegar is noticeable only with a hearty slug of the drink. It doesn’t really detract, though cocktails with a heavy liqueur component may become a bit acidic and, well, vinegary on the finish.