Soy wax melts made from Denali soy and coconut wax, and a mixture of essential oils and fragrance oils.
Each cube can be broken off individually and the scent from each will last for approximately 20 hours (around 4 tea light candles). Eventually the wax will remain, but the scent burns off.
The wax can simply be removed and you start the process again, or can keep refreshing with your own essential oils.