I got this idea in the old days watching Lavern and Shirley make Pepsi and Milk... only this really tastes like a great rootbeer float without all the calories. I make this when I need a quick sweet fix.

Put a slash of ice cold milk in a tall glass
Add some Diet A & W rootbeer.

Adjust ratio to your taste.
Only add ice if youre gonna drink this fast, because it will dilute the flavor.
Enjoy in moderation.

Oh my! I think I will add rootbeer to my shoppin list... This sounds wonderful, I can't wait to try.