Honestly I was not expecting a whole lot from this diffuser. I figured, just like the rest, it would be all plastic - MAN was I wrong! I was completely in shock when it showed up and the outside is actual GLASS. Such an awesome diffuser and so unique from the rest! The light feature is great, as it cycles through many different colors. Just a wonderful diffuser. Two thumbs up! Also, my mother already stole this from me cause she liked it so much!