I've been using essential oils lately. Some of the oils are all right for straight usage. Some require dilution with another oil. I'm using grapeseed oil. It's four ounces of grapeseed oil to a couple of drops of essential oil. I was putting the mix into a bowl, but I don't use the whole amount at one time. I had some travel containers from WalMart. It's the perfect size. So I went back to get another pack. This time the containers are blue...but still inexpensive and the perfect size.