Fill your glass with 4 oz of water. Drop in 2 Alka-Seltzer® Lemon-Lime Tablets. Once the tablets have fully dissolved throw in a dash of coconut water. Next, add 2 drops of green food coloring to the potion, stir with a spoon. Lastly, add your ice cubes, place an apple slice on the rim, and the concoction is complete. Now, just enjoy!