Blueberry Lime Rickey

Combine the blueberries and water in a small saucepan over low heat until soft enough to smash easily with the back of a spatula, about 5 minutes. Carefully mash the blueberries with a potato masher until none remain whole. Increase the heat to medium and keep the mixture at a steady simmer for 8 minutes, stirring frequently. While the blueberries cook, place the sugar in a large heatproof bowl. Line a fine mesh sieve with cheesecloth and place it over the bowl. Carefully pour the blueberry mixture into the sieve and allow it to drip until the dripping becomes intermittent, about 5 minutes. Lift up the sieve and stir the syrup until the sugar is dissolved.

Place the sieve back on the bowl and allow to drip until the dripping stops, about 5 minutes longer. Save the solids for another use.

Let the syrup cool to room temperature and refrigerate.

Combine blueberry syrup, lime juice, and seltzer. Stir to combine, top with ice to fill, and serve immediately.