Seasn DARK is a 0.0% ABV bitters concentrate designed to do what Angostura does for a Manhattan or an Old Fashioned — add aromatic complexity and depth — without the alcohol. It was created by Ben Branson, who also founded Seedlip, and the brief was to build something that could genuinely function as a cocktail bitters substitute rather than just a novelty. The formula uses kola nut as its bittering foundation, with smoked cherrywood adding a wood-smoke character, star anise bringing liquorice warmth, and cinnamon and black pepper rounding out the spice. The base is vegetable glycerin (55%), which gives it the viscosity and binding quality that bitters needs to work in a drink without adding alcohol. It is genuinely sugar-free and vegan. Used at three dashes it adds real character to dark spirit mixers, dark sodas, and ginger ales. Unlike traditional bitters it can be used more liberally — you could add more than three dashes without worrying about ABV creep. The 100ml bottle gives 50 serves, which compares favourably with the 36 or so you get from a standard 150ml Angostura bottle. At £14.99, it is clearly priced as a serious bar tool rather than a novelty add-on.