Best advice is be prepared to buy many different brands lol. With DS we started with Tommee tippee but they seemed too big. We bought him some NUK dummies as they are very slimline and they were a hit so we bought him the bottles. He liked Avent bottles too and lartterly MAM dummies (both brands were bought when I needed spares urgently and they were all I could find in Asda on holiday).
This time I have bought MAM bottles (have a look in TK MAX, they do all the brands for much cheaper) but will be attempting to breast feed as best I can).
ETA we have the tommee tippe steam steraliser but I found it took a lot of cleaning and never came up as new so moved to the milton cold water tablets x