Begin by preparing your glass. Use a brush or your finger to coat the rim with agave syrup, then roll it in Tajin until evenly coated. Set the glass aside.

In a cocktail shaker, muddle the cucumber slices with simple syrup to release their fresh, cooling flavor.

Add vodka, elderflower liqueur, lime juice, and chile bitters to the shaker.

Fill the shaker with ice and shake vigorously to chill and blend the ingredients.

Strain the mixture into the prepared glass filled with fresh ice.

Garnish with a cucumber slice for a crisp, refreshing touch.