Rule #2: Use contemporary images.

Nobody wants a product that's associated with the past. Especially milk! Whew! Ever imagine what medieval milk would smell like today?

mona lisa with a tatooe holding a milk carton

And, by the way, let's give that statement a little "oomph" by taking out the contraction. Don't be afraid to say it like it is!

And speaking of telling it like it is, I frankly don't like the whole European thing going on here. Which takes us to the next improvement.