Place a handful of fresh cranberries in the muddler and squeeze in a splash of lime juice. Gently mash and muddle for about 30 seconds until the berries release their juice and the mixture smells bright and citrusy.
Fill your cocktail shaker about three-quarters full with ice. Add the muddled cranberries mixture, along with 2 oz of vodka and 1 oz of cranberry syrup.
Shake vigorously for about 15 seconds, until the outside of the shaker feels cold and frosty, and you hear a slight crackle as the ingredients mix well.
Place a strainer over your chilled copper mug and pour the mixture through, catching any pulp or berry bits. Fill the mug with fresh ice if needed, leaving space for the ginger beer.
Slowly pour 3 oz of chilled ginger beer into the mug over the mixture. Listen to the fizzy bubbles rise and watch the drink sparkle with effervescence.
Gently stir the drink with a spoon or straw to combine the flavors, taking care not to lose too much of the carbonation.
Garnish with a few fresh cranberries and a lime wedge on the rim of the mug for a festive touch. Feel the coolness of the copper mug and enjoy the vibrant aroma.
Serve immediately, savoring the crisp tartness of the cranberries balanced with spicy ginger and smooth vodka. Take in the bubbles and the bright red color of your cocktail before taking your first sip.
