Recommend type of fast flow sippy cup

junebug555

My DD is an eater/drinker!  She's been drinking 7-8 formula since 6m and currently using the Phillips Avent natural bottles.  I'm at the fastest flow and not fast enough for her now.  I'm thinking I should transition her, but I've tried 2 so far and they weren't fast enough. I can't remember the names.  She didn't seem picky about the change in spout, just frustrated because it took her forever to drink. Does anyone in this age group have this issue and what have you done next?