Prepare the Lychee Juice: Drain the canned lychees, but reserve the syrup in a separate container. Place a few lychees in a blender with a little reserved syrup and blend until smooth. Strain the puree to get a clear lychee juice.

Mix the Cocktail: In a shaker, combine 2 oz of the lychee juice, 2 oz of vodka, 1 oz of fresh lime juice, and 1 oz of simple syrup. Fill the shaker with ice and shake well until chilled.

Prepare the Glasses: Fill your cocktail glasses with ice cubes and strain the lychee mixture from the shaker into the glasses.

Top with Sparkling Water: Fill the rest of the glass with sparkling water or club soda to add a fizzy touch to your cocktail.

Garnish and Serve: Garnish with a fresh mint leaf and a lychee or lime wedge. Serve immediately and enjoy the refreshing taste of the tropics!