We use the playtex drop ins with the latex nipple and he does pretty well. It has been about 2 weeks since ds3 had a bottle and 2 weeks ago he took it no problem but today my dh said he fought it for about 10 minutes but finally took it. When he did suck he drained the bottle with about 3oz in no time at all.. I have to go back to work nov 8 so we will be practicing a little more often although my dh doesn't really see the need. I just don't want my poor baby to be hungry without me. Luckily I work nights so he will really only need about 2 or 3 feeds from my dh and then I'll bf him during the day.