Aroma Beads are small clear plastic poly beads that absorb up to 30% of their weight in fragrance oil. This fragrance can last up to six months, depending on the fragrance oil used, making it an easy alternative to candles. They can be placed in a glass vase, potpourri dish or other decorative container. These beads call also be cooked in a cookie cutter to make car air fresheners! Mix different colors for a nice design feature!