I think is also depends on the baby. I had Avent bottles for Mackenzie but she sucked too much air in even though these are meant to be like a nipple - I ended up using Nuk bottles and dummies. (I also started with Avent dummies but changed because I thought she would prefer to the same as her bottle - but who really knows!) With this bub I will be using the Nuk bottles again but stearing away from the Nuk dummies due to what rayray has said. A friend of mine was BFing and when she tried to get her son to drink her expressed milk from the bottle it took her a long time to find one that he liked. I think she spent about a week and many $ trying all different brands. So back to my opening sentence sometimes it depends on the baby!