Recently switched to whole milk and my son isn't too crazy about it. He probably drinks 8oz throughout the whole day. I have to always remember to offer water because I'm really worried he's too dehydrated. So it's hard when I leave him with a sitter because they don't ever seem to remember to offer it. (I actually have to hold the cup to his face sometimes. Handing him the cup isn't always enough.)

What are some ways I can

A.) Make sure he's getting all the nutrients of milk

B.) Stay hydrated without offering juice? (I have done some really really watered down juice when I'm desperate)