Put that copper mug to good use! Zero Proof Cocktail from Pour Girl (vodka optional if you so wish).
1/2 oz Carmel Berry Co Elderflower Syrup
1/2 oz rosemary syrup (1:1:1 three equal parts water, sugar, fresh rosemary. Simmer for 30 minutes, strain liquid, and store in refrigerator for up to a month.)
2 oz fresh squeezed grapefruit
2 oz club soda
Garnish: rosemary, grapefruit peel
1.5 oz vodka (completely optional)
Stir all ingredients together with ice directly in your chilled Mule mug. Enjoy!