A typical mascara dries out before half of it is used. When your favorite mascara starts getting dry, add 4-5 drops of saline solution or eyedrops to the bottle. Insert your wand and stir and…TA-DA! Fresh mascara! This can be repeated 2 or 3 times until all you mascara is gone.
I have a few of these square glass jars from flower arrangements. I like the look of these stones, but I think smaller stones/beads might work better? Great idea for brushes, maybe even tooth brushes??