Coil Star is a Vapour Depot brand, designed to give you great flavour without any added sweetener to promote extra coil life in all of your devices. Flavour Profile: Blueberry, Menthol Recommended Mix Percentage: 20% Recommended Steep Time: 3 Days Requires mixing with Vegetable Glycerin & Propylene Glycol before can be vaped. Coil Star Blueberry Ice is a fantastically refreshing juice. Blueberry ice is a mix of fresh blueberries with just the right amount of menthol.