We have worked hard to make a safe product. Our wax has a higher melt point than either soy or vegetable based wax. Our warmers have been designed to work with that wax. The wax was formulated so that it could carry a higher fragrance load and to melt slower so that the fragrance would be protected and therefore last longer. Soy based wax is very soft with a low melt point. The fragrance in that wax won't last very long. Vegetable wax is not stable and can explode thus should not be used at all.