So I took mine back yesterday and they are accepting the bottles, not the extra nipples or pacifiers or anything like that. I got almost a $60 credit and bought two new kinds to try.
The first one was the Born-Free bottles, which we have yet to try, but looked pretty good.
The second one was the Adiri Natural Nurser, which looks weird, but we're hoping may work for our baby to take a bottle sometimes.
I didn't have a receipt and I didn't have the boxes. I took back the Avent bottles and the Playtex VentAire ones as well.
I also got a few sippies for my older one that are supposed to be BPA free.
Looks like Playtex is offering a free bottle (BPA-free) with the drop-ins at their web site.