Mix Boom Energy Tropical or Raspberry with 500ml water, shake it and then put it in your ice cube mold. I used the ice cube bag myself and the flavor Tropical. Then put it in the freezer. You can use the ice cubes after a few hours.
Meanwhile, fill your shaker cup with the other Boom Energy flavour, in my case the Raspberry. Add between 300 - 600ml of water (amount of water of your choice). Shake it and then put the energy drink in the fridge.
When the ice cubes are well frozen, remove the shaker with the other flavor from the refrigerator and add the ice cubes. If you prefer separate, put a few ice cubes in a glass and pour in the other flavor. This is a nice cooling drink for the warm weather.
Try it out for yourself and enjoy!