I keep meaning to look back at this and post.
It is a very frustrating time and quite upsetting too, when they're just screaming every time you bring the bottle anywhere near them.
To encourage you, it will pass and every baby has a different reason for going through this. Some babies will have medical problems, but it seems such a co-incidence that they seem to do this at around the same age. I'm guessing you have very alert babies.
My health visitor was great and told me it was developmental and that at around this stage they are becoming so interested in the world around them that feeding is the last thing they want.
However, to throw another issue into the discussion. We wondered if Alice was getting bored of feeding a couple of weeks ago and we wanted to move to follow-on formula. We are using the playtex drop-in system. Unfortunately the formula was too thick to go through the fast flow teat, so we decided to go back to our tommee tippee bottles with a fast flow teat (had been using medium flow). She screamed just like she did before we took her off them. She was much more windy too and would take an hour to feed again, with much squirming in between etc. So changed to a different follow-on formula and went back to the drop-in playtex bottles and she was fine again.
I agree with Christina, we had exactly the same positive reaction when we changed to the playtex bottles from the tommee tippee bottles initially and she's been fine ever since. She's not a great feeder, but she is taking 7-8 ozs in every feed now and takes it fairly quickly. The change was immediate and she is much less windy on these bottles now too. So I will definitely be recommending them to all who want to bottle feed and also those who don't want to bottle feed but end up doing it.
Just to reiterate, this time will pass, hang in there, it does get easier. Then we have potty training and the terrible twos to deal with. Hurrah