I have an old really cheap ionic diffuser with a big bowl, it is so old I can't read the maker anymore, ( I think I bought it because it was cheap and my favorite color
I don't buy into the hype of buying expensive blow dryers if I only use it twice a month. The most important thing for me was that it has a cold setting . I always start on warm for a short time and finish cold. I never had any heat damage or spit ends.