Bye, bye bottles...already?

Andy has 4 bottles/day. Since Kaylee was not keen on having her formula/milk in a bottle and I ended up going cold turkey switching her from bottles to sippy cups at about 11.5 months old and as a result she didn't drink much (any?) milk for about 3 days, I thought maybe I'd try to start getting Andy used to drinking formula from a sippy cup now and ease him into it - if he pushed it away, we'd just go back to bottles, but I'd at least offer it once/day for a while and go from there. He decided to just take right to it and has now had 6 sippy cups of milk in a row - his last bottle was the lunchtime one yesterday. Go, Andy! Of course the only sippy cup that works well for him right now is the freebie one (Pampers brand) we got at his 9 month pediatrician visit...so I've had to wash it in between each use. The others we have seem to let too much into his mouth at a time and he either can't swallow it right and coughs on it, or pulls the cup away and some pours down his chin. I went out and bought another brand tonight (they didn't have the Pampers one where I went), so hopefully those will work for him. If not, we might be heading out to see if we can find a few more Pampers ones tomorrow!