Lifelines Discovery Set features Melissa’s favorite Essential Oil Blends across our five scent families. Add the perfect amount of Essential Oil Blend to your favorite Lifelines diffuser with no guesswork and no spills using our patent pending Precision Pump™. Discover your favorites and create your unique well-being practice.****WORKS WITH WATER BASED DIFFUSERS OR GROUNDING STONES** NOT FOR CANDLE/ PLANT/SHOWER DIFFUSERS***** Lifelines blends are specially created for an extraordinary aroma experience using 100% pure essential oils and sustainably sourced botanicals from around the globe. They are free from parabens, phthalates, dyes, and formaldehyde donors and blended in the USA.