When you purchase your Premium Starter Kit you will choose the type of diffuser you wish to receive. Regardless of your choice you will LOVE this addition to your home. If it only filled your home with wonderful scents it would be enough. But, your diffuser does much more than that. It actually disperses the oils throughout your environment so that you receive the health benefits of the oil you choose to diffuse. Cedarwood and lavender next to your bed after a stressful day. Gentle Baby in the nursery. Thieves next to the couch with your sniffling husband. Purification in the teenagers bedroom.