Hey girls,
I totally recommend the Playtex Drop-Ins. I've been using them with my ds for a year now, and we've never had any problems. I did buy the ventaire's when he was about 3 mo, just because I needed extra bottles, and I wanted to try them out. I found with those that he spit up at almost every feeding, which was out of the ordinary, so I decided to just get more of the drop-ins. As a bonus, now they make the 8 oz. liners expandable to 10 oz. which is working great for us now that ds is drinking more at a time. And they are bpa free. Good luck with whatever you choose!
Whiskers