Pour the grenadine into a collins glass THEN add ice. Swirl the grenadine to chill it, so it stays on the bottom during the build. Pour in the Dekuyper Watermelon Pucker schnapps. Carefully add 7-Up (or Sprite or Red Bull) to create a clear layer in the middle. Layer the Midori on top. The drink now looks like the Mexican flag. Place in straw but DO NOT STIR.
The preferred consumption method is known as 'melon picking.' The drinker (often female) sucks on the straw and pulls it up from the bottom so all the flavors individually flow quickly through the straw.