Buy Blue Slushie (Sativa) – 1.5g Preroll AU Online. A refreshing and uplifting sativa, Blue Slushie delivers a bold burst of berry and citrus flavors with every inhale. Perfect for staying motivated and inspired, this preroll provides a smooth, flavorful experience that keeps you feeling bright and energized throughout the day. Blue Slush is a potent indica-dominant hybrid marijuana strain made by crossing Blue Sherbert with Blue Cookies and Sunset Sherbert.