Hi Kara,
So I started just using the avent one at meal time and he actually drank milk from it but as you mentioned your issues with I figured I would have the same issues as it is a fast flow and he would probably end up choking on his milk. After I read your post I re-introduced the playtex sipster and he managed to suck milk out of it. So far so good...just offering him the milk at each of his meals. He isn't holding his cup though lol, he's trying to so it's a work in progress.
I haven't actually started using the sippy in place of one of his bottles because his sleep has gone a bit wonky and I wanted to get that sorted out first (I think he's already starting the 2-1 nap transition

). I know I should just suck it up and do it but I'm just scared to mess up a good thing. I feel like I'm forcing my little guy to give up something I normally wouldn't do prior to his first bday. I guess I'm trying to come to grips with the fact that he's going to be in daycare soon and I'm starting to freak out a bit.
Anyways I will do the switch, I will...start next week...thanks for the support.