Gone are the days of mixing oil and water in your oil burner. These little gems are soy wax oil burner melts. They release fragrance throughout your room without the need to add anything to your oil burner. Just place one in your burner, light a Tea Light underneath and enjoy the beautiful fragrance as the wax melts. Once your Tea Light goes out the melt will harden again. You can keep on re-melting your melt until you cannot smell the fragrance any longer. These Soy Wax oil burner melts should last approximatley 35 -40 hours of fragrance. Some oils will last longer as they are a thicker oil and take longer to disperse. Some oils will last shorter as they are a thinner oil and disperse quicker.