Love this and I use very little of my hair fibers now. Doesn't run or rub off. Very fancy case so it should be reusable and allow us to buy refills (like the hair fibers) as what we get now doesn't last as long as the hair fibers. Replacement inserts should be made much like tea candles in small drop in tins of coloring. That or simplify the packaging to make it less costly and then give more powder to equal the difference. The current case could easily hold twice as much product.