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I learned to make wonderful organic naturally carbonated ginger beer. Not only yummy but loaded with health benefits! Same skill applied to homemade root beer.
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If you're ever in Pueblo CO, stop at the Shamrock Brewing Company. Not only is it a great place to eat, but they make their own beer (which has some really great varieties), and best of all, they make their own root beer, and it's made with honey, not sugar. Stuff tastes even better than the old A&W rootbeer from the 70's (old timers will know what I'm talking about).
Best part? You can buy a "growler" (1/2 gal. glass jug) for a fair price and take it home with you. Bring the growler back, and they will refill it for cheap.