Any health drink that tastes like rosemilk?

Hi friends,
My four year old refuses to have milk. I have tried everything with milk like choc complan, strawberry, ovaltine, bournvita, amul pro and many many more. He never drank and only I completed the bottle. Recently I discovered that he loves rosemilk. I bought a packet of rosemilk powder and gave him everyday thi summer. I finished the pack and I don't want to buy another as I feel it is not safe to drink regularly. Does anyone knows a health drink which tastes similar to rosemilk? I badly need it as this is the only form my son drinks milk.

Thanks,
Viji