I think you should get whichever steriliser is the same brand as your bottles. I have an Avent steriliser (the microwave one which I think from memory was about $80 odd - I think!!) and mainly Avent bottles, and also some Tommee Tippee bottles. The steriliser is great for the Avent bottles but for the TT bottles its a huge pain - they don't fit in any of the slots and you can't get that much in (you can do 6 complete Avent bottles at a time).