It doesn't matter if he doesn't drink milk. Adding packaged foods is not advisable. Just ensure you give him a lot of nutritious food like - fruits, vegetables, dry fruits, nuts, sprouts. Also refined sugar is highly damaging for human bodies. I wouldn't recommend giving that to your child at all. My daughter is 4 and has been off milk for the last 2 years, there's absolutely no problem with her growth and development.

No worries give him yogurt, cottage cheese, or some other thing which is made of milk, he need only approx 500 ml milk now. Try to dilute cows milk add little bit of sugar may be this will help, babies don't act new things easyly u have to be patient