I am sorry to disagree with the other posters, but this diffuser did not last very long for me. The fragrance is lovely, but you have to be close to smell it - it does not permeate even a small room. Plus the liquid has all evaporated. I have others I have purchased at department stores long before I purchased this one & they are still going strong. They were also half the money. Too bad, because I love Marilyn - but needless to say, I will not be purchasing any more of her diffusers.