We initially used the Avent ones. We changed to Tommee Tippee cherry style because we found the Avent ones which are thinner were always falling out while he was going to sleep and he became unsettled and we spent half the night going in to put the dummy in. We have used Happy Baby but think they are a bit flimsy compared to TT.

One thing to keep in mind is that silcone ones can be sterilised in the microwave while the latex ones need to be boiled or cold sterilised.

HTH.