Full gram Indica Watermelon Zkittlez Infused Cannabis Pre-Roll From Interface Extracts, .7 Grams of Flower and .3 Gram of Live Resin. Watermelon Zkittlez Kief Covered Preroll Interface is a new up and coming brand making a name for itself across California. They specialize in concentrates and prerolls that utilize some of the most sought-after strains in the game. They are a very affordable brand that makes it easy for you to get what you want without hurting your pockets.