We got rid of the bottle with both mine at 12 months. My son decided at that time he was not going to drink milk either. We just made sure we gave him enough yogurt, cheese, etc. and the ped. was fine with that. He will definitely drink when he's thirsty, and I'm willing to bet that once he sees the other kids drinking put of a sippy, he will do the same. My kids eat and drink very different for me at home, then they do at daycare (much better at daycare). The teachers say all the parents say that, and the kids just do what they see the other kids doing. I wouldn't worry to much. It took my son until he was 3-1/2 to start drinking milk at home, but come to find out, he drinks it at school...
On the other hand I do have a friend that gave her daughter sippy cups during the day, and a bottle of milk each time before bed until she was 3. Her pediatrician told her to get the milk in her any way she could (different my my pediatrician). But she wasn't eating as much yogurt, cottage cheese, and other cheeses my son was.
I wouldn't worry to much. Do what you feel is right. Just watch his fluids, and he'll come around at home. If he does end up drinking juice, try the calcium fortified OJ.
Good luck.