I use a micro steriliser its up too you but most hosp dont recomend sterilising anymore, I prefer too though

also if possible as its so much easier down the track get bub used to room temp boiled water for feeds, no heating required easy when out and about etc

I found the closer to nature bottles were great to begin with....DS#1 went to avent at 6 weeks where as DS#2 had both and prefered the closer to nature ones, best bet if you can borrow a few types and see which one bubs prefer then go out and buy, I had 6 small ones to begin with a still have 6 of the 240ml ones...you dont need dozens