My take on a Grapefruit, Apple & Pineapple Juice.
Grapefruit - FLV Pink Guava gives a great realistic Grapefruit flavour that stays on the palate throughout the vape.
Apple - CAP Fuji & CAP Double Apple combo gives a delicious, yet light apple brightness to add some complexity to the mix.
Pineapple - INW Pineapple provides a realistic pineapple flavour & CAP Golden Pineapple adds the artificial sweetness flavour.
I added TFA Cotton Candy for some brightness and feel free to add your desired amount of sweetner and(or) cooling.