Have you ever tried water marbling?
If yes then you know how much mess you need to make just to be able to get them on your nails, right?!
This is such an easy and awesome alternative, I just watched this a while ago and I might do it on my nails tomorrow.... I'm planning to get some new polishes tomorrow by the way;)
This tutorial is from Get Nailed, you can head on to her YouTube page to see some more tutorials of nail designs ^_^