Place the strawberries, sugar, and vinegar in a bowl. (I left the stems and leaves on.) Mash with a potato masher. Cover and refrigerate overnight. Strain and transfer to a sealable glass container. To serve, fill a glass with ice. Add a couple of tablespoons of shrub. Top with soda water, vodka -- or both. Garnish with mint. Think of Steel Magnolias and enjoy.