This is my first deal post. I have the same diffuser in the dark wood grain (now sold out) and love it. This diffuser is currently $27.95, but if you click on the "Buy 1, Get 60% off" link on the product page- it drops the price to $11.18. Ships free with Prime. Available in light wood grain and white.
It only lets you buy one at this price. Wish I could buy more as Christmas gifts.
Here's a SlickDeal alert from September for the same brand and Seller-
This is my favorite of the 3 diffusers I own. The 300ml size runs for two nights of use for me. Someone pointed out something about Fakespot F in the comments and said that I probably posted one of those. I'm not sure what Fakespot F is, but I actually am awful about posting reviews of things I love and am usually only "moved" to do so when something works out very poorly. I have posted 5 or 6 positive reviews on Amazon over the past 10 years, but none for diffusers. Haha! Link to my Amazon reviews in the comments below.
I've been watching them on Amazon and this was the lowest price I'd seen for this type/size. I have been using SlickDeals for years - but have always been hesitant to post anything for this very reason. With this deal, this diffuser is way cheaper than even the poorly rated ones and it's my hands down favorite of the 3 I have. My other two are the "tulip vase" shape.