my daughter will still choke some becuase she doesn’t pull the sippy cup away and ends up getting to much in her mouth. I haven’t really worried about it though, but I guess she doesn’t do it all the time. Maybe it is just going to take some more practice, because she is so used to the thickened drinks…start really slow with just a tiny sip and then pull the cup away. That is how my daughter started. Although she still chokes sometimes, it is not nearly as much as before. good luck