This 18 oz bottle of Sage and Citrus scented glow bowl gel crystals will make your home smell amazing. Use it with our electric warming unit which uses a low watt light bulb to heat the scented gel, diffusing the fragrance into the air. Pour enough glow bowl gel into the glass vase to cover the light about 1 inch deep or more. Turn on the unit and enjoy. The gel will stay moist and fragrant for days. When it starts to look dried out, do not get rid of it just yet, simply add a little bit of water to it and smell it come back to life. After a few of these cycles, replace the gel with more of the same scented crystals or clean out the vase to try a new fragrance. In addition to the wonderful fragrance, these units make cool night lights as the light from the bulb shines out through the colored gel.