Question on cow milk/sippy cups

Elaine

1) So at 12 months, we supposed to switch completely from formula/bottle to cows milk/sippy cups all together?

2) Do we transition slowly before 12 months or start transition at 12 months? Or cold turkey switch all together?

3) our daycare requires cows milk at 12 months so it seems like it will be cold turkey switch for daycare...