Note: Aroma Crystals NOT included (sold separately). Hobnail Glass with Scalloped Rim. Simple to use and economical. Just add the Aroma Crystals and turn on the light - it's that simple. There is no flame and can be used in classrooms, college dorms, nursing homes - anywhere that open flames are not allowed. • Please use with La-Tee-Da! Aroma Crystals only. Each jar of crystals contains approximately 2-3 refills. • VOC and CARB compliant