I have an Avent bottle that we got when we were going through the same process with DD1, although we never used it much. When it's filled with liquid (I've been testing with water) and turned upside down, it drips quite quickly. Given that a lot of people have said that their breastfed baby liked Avent bottles, the fast drip surprises me.
I'm tempted to buy another Avent to see if it does the same thing. But before I do, I thought I'd check here. Does anyone here have or use Avent bottles, and if so, do yours run a fast drip if held upside down?