Combine 1 cup of blueberries, 2 cups of coconut water, the juice of 1 lime, and 1 tablespoon of honey in a high-speed blender. Blend on high for about 30 seconds until smooth.

Taste and adjust sweetness by adding more honey if needed, then blend for another 10-15 seconds.

Add a handful of ice cubes to the blender and blend on high for another 15-20 seconds until frosty.

If desired, strain the mixture through a fine-mesh sieve for a smoother texture.

Pour into chilled glasses and garnish with a slice of lime or whole blueberries. Serve immediately.