Most men appreciate a stiff one (we’re talking drinks, people). And most men enjoy impressing others with their knowledge of crafting a good stiff one (please). Adam Lantheaume’s recently expanded cocktail-supply shop, in a new Davis Square location, is like a candy store for mixology connoisseurs. Books about cocktails, handstitched ice-crushing bags, shaker tins, glasses of all shapes and eras, and a vast selection of garnishes help stock every man’s dream bar. And hard-to-find ingredients like gum syrup and maple bitters will have him drunk with joy.