Step 1: Place the blueberries, raspberries, and strawberries in an ice tray, then fill each compartment with coconut water. Freeze them until they're solid, which takes about 4 hours.
To make the drink:
Step 2: In a pitcher or large measuring cup, mix the honey with the lime and lemon juices. Stir until the honey is completely dissolved. Add the seltzer and gently stir everything together.
Step 3: Fill your serving glasses with the berry ice cubes, then pour in the lemon-lime mixture.