Highly fragranced potpourri tarts or Melts are hand-made from the best quality fragrance oils, and contains fragrance fixatives. You will be able to use (2) heart-shaped Tarts or Melts in your Potpourri burner. When heated with a tealight candle in your potpourri or aroma burner, you will experience a wonderful aroma in your home or office. Potpourri Tarts or Melts are reusable.