MUG® Root Beer and San Francisco 49ers tight end—and certified root beer fanatic—George Kittle debut MUG® Brotein: a “dirty protein” remix made by mixing MUG® Zero Sugar with a vanilla protein shake.

Of all the favorite summertime beverages to choose from, root beer generally makes the top five. It’s been an American classic long before most of us were born, and with more than 2,000 brands to ...