Our newest offering is an USB-powered ultrasonic diffuser. Water & oils. The Luna will run for about 4 hours, and has three intermittent settings. We didn't forget the light show either - you can turn the lights totally off, or have them lull you to sleep.
Luna's 1.5" x 3" x 3" footprint is super small - but don't let her size fool you. The fan rivals many larger sized diffusers we've seen on the market. There's a one-year warranty too!
At $19.50 she's not only adorable but affordable too.