Do you know any good beauty related inventions?

I need a beauty related invention.





It is a very open topic.


Don't worry about me stealing your idea or whatever


It is for a homework assignment and our teacher decided that our invention are ours and he isn't going to tell anyone or whatever.





So something that is REALLLYYY creative(:





Thank you so muchDo you know any good beauty related inventions?
you know how theres an electric toothbrush? well what if it there was an electric mascara, that makes your lashes long/thick and can comb out clumps? just thought of that off my head lol