To make blackberry syrup, stir together blackberries, 3 tablespoons water and cane sugar in small saucepan. Smash blackberries with potato masher. Bring mixture to low boil over medium-low heat. Continue stirring at low boil for 5 minutes, until sugar dissolves.
Remove blackberry syrup from heat and press blackberry mixture through fine mesh sieve, removing seeds and pulp. Allow to cool completely.
To assemble floats, pour 1 1/2 cups chilled sparkling water into each glass. Stir in 1-2 tablespoons blackberry syrup. Add 2 scoops berry coconut milk ice cream and top with additional blackberries. Enjoy!
Recipe by Sarah Bakes Gluten Free at https://www.sarahbakesgfree.com/2015/08/dairy-free-blackberry-floats.html