A friend recommended this tool for water marbling and it's helped immensely! Water marbling is much easier when you have the right tool and this little gem does the trick!
I redeemed my Polish Points for this thinking it was a pen with silver nail polish as ink that I could use for making stripes. Instead I got this weird mechanical pencil thingy that doesn't dispense silver polish at all and just scratches the surface of my nails. I wish I could return it and get my points back but unfortunately I can't :(