If sleep is evading you, this combination of essential oils will help get you ready for a good night's rest. As Twilight dissolves, it turns from the colour of the setting sun and gets darker, turning your water a shimmering deep purple. The fragrance has been designed to help you sleep: lavender is a soothing, mind-clearing and calming fragrance, used in aromatherapy to treat insomnia and aid restful sleep, while benzoin and tonka call to mind a milky caramel malt drink.