Thomas Kemper Soda, a maker of premium craft brewed soda in Oregon, has introduced new Naturally Diet Soda, which is sweetened with stevia and boasts zero calories, zero sugar and zero net carbs.

The company claims that Naturally Diet Soda contains no artificial sweeteners or colors, and is also low in sodium and gluten free.

Thomas Kemper Naturally Diet Soda comes in three flavors - TK Cola; Citrus Bliss - a combination of grapefruit, lemon, and lime with subtle spice notes; and Berry Passionate - a blend of berries and passion fruit.

Launching in January, Thomas Kemper Naturally Diet Soda will initially be available in retail grocers and natural foods stores in the western US as well as most Whole Foods Markets nationally. Plans are to expand to mid west and east coast markets by the end of 2011.

Thomas Kemper Soda Co is a privately-owned company that produces different varieties of craft-brewed soda.

The company's products are available at grocery stores, natural foods markets, finer retailers, and restaurants throughout the Western US. There are plans to increase product availability across the rest of the US and Canada.