Love this Hazelnut coffee creamer. Originally I bought it because it didn't have to be refrigerated, I didn't realize it was concentrated so that was a huge bonus. This bottle lasts me over a month even though I use it every day and I'm a "coffee with my creamer" kinda person. High quality pump and very sturdy bottle. I have had no issues with clogging at all. I do think if you opened it, used some, then let it sit a long time that it may get clogged but mine has been trouble-free.