Add blueberries, gin, and lime juice to a mixing glass or jar.
Using a muddling stick, muddle the blueberries until they are thoroughly macerated.
Fill your beverage glass with ice.
Hold a fine mesh strainer over the beverage glass. Pour the blueberry mixture through the strainer over the ice. To release more juice, press the blueberry mixture against the side of the mesh with a spoon.
Top the drink with lemon seltzer water.
Garnish with mint, lemon or lime slices, or a blueberries on a cocktail pick.
Please note that nutrition facts are subject to change based on your choice of ingredients.