Maidenii is produced in the Macedon Ranges (Victoria) by Shaun Byrne and Oliver Margan the product of a collaboration between a distiller and a bartender, applying the European aromatised-wine tradition to Australian native botanicals. The base wine is sourced from Victorian cool-climate regions; the botanical infusion draws on locally-foraged Macedon Ranges flora (including lemon myrtle, wattleseed, sea parsley, and other Australian native plants) alongside the traditional wormwood, gentian, and spice foundation common to all vermouths.

The Maidenii range covers Classic (medium-dry, the most versatile), Dry, Sweet, and seasonal expressions. The Classic is the signature built for both aperitif service and cocktail use, with a distinctly Australian aromatic character that separates it from the European production models. Maidenii is also the primary Australian producer in the bitters and aperitif sections of the catalogue. For on-premise programmes wanting to feature Australian vermouth with documented local botanical sourcing and provenance particularly relevant for all-Australian cocktail lists or farm-to-glass programmes Maidenii is the reference standard in the catalogue.