I don't know how many people have the same problem when mixxing supplement drinks, but I could never get it to mix up all of the way. Chunks would get stuck in my teeth and it was unbearable to drink. I recently purchased a braun mixxer. It is just a single mixxer that you put in your cup, and it completely mixxes up the powder with no chunks remaining. It is definitely worth the buy, especially at twenty bucks.