I use this one: <a target=_blank class=ftalternatingbarlinklarge href="http://www.amazon.com/dp/B0015XQFGY/ref=asc_df_B0015XQFGY738415?smid=A26T50EHKCFA9V&tag=yahoo-baby-20&linkCode=asn">Avent bottle sterilizer</a>
It is a steam sterilizer that reaches 212* for 6 minutes and if you choose the 24hr setting this allows you to repeat the cycle as many times as you want in that time frame, so you can repeat if you do not feel 6min. is long enough. It comes with a couple different racks that can be configured however you want. It's BIG... you could fit 4 sets of nebs on the bottom with the small pieces on the top rack, easily. (Emily's acapella also easily fits, which I know is an issue with some sterilizer.)
Washing with warm soapy water prior to sterilizing is still recommended, of course... as would be for any sterilizing method, but this is a quick step.