I love love love love this diffuser. It's a HUGE 300 ML.... that means that it can last up to 6 hrs. WOW!!! That means if you want to run it all day - you only have to refill it 4 times a day. It's super easy to use. I love that it changes colors, or you can select which color you want. There are three rubber feet on the bottom, so it stays where it should. It's 100% silent too. This diffuser is all plastic so it'll really last. The mist comes out the top. It's a totally great diffuser. Disclaimer: I received this item at a discount for my honest and unbiased review. amzn.to/1kQEPPv