Dylan cut his milk down to two bottles a day by about 14mo, then at 18(ish)mo cut down to one bottle. He kept that one until he was about 2.5yo and then decided he didn't want it anymore. I didn't worry about it too much tbh, it was a comfort thing and (like PH's B) he always had it before teeth brushing so I wasn't worried about it damaging his teeth.
Tbh (this might sound judgy but I don't mean it to!) I think the guidelines wrt bottles are not so much aimed at sensible parents who might let their kid have a bottle past 12mo but take care to clean their teeth after, etc, as they are aimed at the parents who put their child down for every nap/bedtime with a bottle in their mouth to fall asleep with. The way I've always understood it is that it's that which is really damaging to teeth..
So, no, I wouldn't worry about the bottles - he will wean eventually.. It's Baby Led after all
