So, Mark has decided at 9 months old that he's too "big" for a bottle. We've been using Born Free bottles and loved them. He's been holding them by himself for quite a while (we took the sippy cup handles and put them on the bottles so he could hold them himself). About a month, month and a half ago he dropped to two bottles - one when he wakes up in the morning and one before bed.
Now, it's sippy cups only. He figured out how to take the bottle and squirt it around - so he'd "play" with it instead of drink it. But give him his formula in a sippy cup and he's happy. He also loves watered down juice and the yougurt/juice blend in his sippy cup too. And of course water!
So, we're using the playtex first sipster (he prefers handles) because our pediatrician at his 6 month appointment said he needed to not use soft spouts (they are kind of soft, but harder than most soft spouts). It's hard to find sippy cups with hard spouts and handles. We did find a few at Walgreens, but he prefers the first sipsters a bit better.
If anyone can recommend a hard spout sippy with handles, we'd be glad to know about it! Our little guy is growing so big, and independent.