It's normally advised to stop bottles by around 1 year in UK. It can be bad for your lo's teeth, especially if they take a bottle to bed with them. Giving bottles can also result in your lo drinking too much milk which can put your lo off solids which are more important now. My dd was off bottles by around 14 months with relatively no problems. She will now take milk out of any cup - non-spill, open, with a straw, etc, etc
Seona