we had avent dummies but DD wouldn't use it. we were recommended to get cheap old cherry teat dummies from the supermarket, so we got the tommee tippee ones and DD loves it. We have avent bottles and teats. DD has only had 2 bottles with EBM as we went out and she was with nanna and she had no problems - guzzled the milk! no problems with breastfeeding since introducing the dummy either. we are going to do the same thing with EBM and DH but i've got to get around to expressing first!