When can I stop sterilizing my baby's bottles (she's currently 14 months old and formula-fed)?

I've read that you must sterilize feeding bottles until your baby is at least a year old. Here's a good read explaining why: http://www.babycentre.co.uk/x554846/when-can-i-stop-sterilising-my-babys-bottles However, if you still feel like you really have to sterilize them, why not? Just to be sure, it wouldn't hurt :)