A decade ago, former tech guy Adam Lantheaume—inspired by his love of after-work drinks at the B-Side Lounge—opened this cocktail lover’s supply shop filled with tonics, shrubs, tools and more, including hand-blown Tiki mugs and Old-Fashioned glasses from Cambridge artist Andrew Iannazzi. Every item on the shelf is tested by the mixology maestro himself, and you can even do your own research by dropping into the Bitters Tasting Bar or taking the shakers and other equipment for a spin in the designated practice space.