Pour grapefruit juice & tequila into a champagne flute. Drop in agave syrup (it will sink to the bottom so do not shake or stir) Cut a lime into small wedges. Pat dry the wedges with paper towels. Roll in granulated sugar.
Garnish with sugared limes & a cranberry.
Put some ice in a champagne flute. Pour in cranberry juice, tequila a splash of lime juice. Top with sugared cranberry skewers & lime wedges.