LO is 6 weeks and EBF, but I've been starting to pump to try and introduce a bottle (we have a movie date planned two weeks from now, so she needs to be able to take one by then). We have the Phillips Avent natural bottles, and they came with a "1" nipple. Is there a slower flow nipple than 1, or is that the slowest? She seems to forget to breathe while taking the bottle, so then will suddenly come unlatched and milk goes everywhere.