Prepare your glasses by filling two highball or collins glasses with ice cubes. The ice should fill about ¾ of each glass to ensure your drink stays properly chilled.
Combine the core ingredients in a cocktail shaker: add the pear vodka, elderflower liqueur, fresh lemon juice, and simple syrup (if using). No cocktail shaker? A mason jar with a tight lid works perfectly.
Add ice to the shaker and seal tightly. Shake vigorously for about 15 seconds until the outside of the shaker feels cold. This proper dilution is key to balancing the flavors.
Strain the mixture evenly into your prepared ice-filled glasses, leaving enough room (about 1-2 inches) for the sparkling water.
Top each glass with sparkling water, adding about 2-3 oz per glass. Pour slowly to preserve the bubbles and prevent overflow.
Gently stir with a bar spoon to incorporate all ingredients without losing carbonation. Just 2-3 gentle turns is sufficient.
Garnish beautifully with fresh pear slices or lemon wheels, and add a sprig of mint if desired. The aromatics from the garnish enhance the drinking experience.