My son was 15 months and still on a bottle. He was on chemo and I didn't want to take it away but he got to where he wouldn't eat and only wanted the bottle. His dr. said to start adding a little bit of water so he wouldn't like the milk as much. Over the next week add a little more water and keep going week by week till he got to where he didn't want it anymore. It worked great. He gave up his bottle on his own and wanted the sippy cup. Hope this helps.