I am finding that the ring adapters which come with the large Avent bottles are melting in the steam steriliser in the microwave. I called Avent about this a few weeks ago and the fault was firmly laid at my door. They said that I mustn't be sterilising properly. They emailed the correct procedure for sterilisation (don't overcrowd, use 200ml water, timing, etc). I was already following this procedure. Yesterday another one melted. These bottles are expensive!
I noticed last week that Avent are now selling bottles without an adapter (sorry, with an integral anti-colic system). I wonder if this is because other people have had issues with melting adapters. They told me this was not an issue. Anyone else find they are melting?