Not sure when "COCA COLA" will have one but here is some info I found for you (by the way I did try this and its .....ok tasting there lemon lime soda tastes better though -- you may find this product at your local health food store or you may need to ask them to look into ordering - you can also order via website..
ZEVIA™ Natural Cola has a classic cola taste. It does not contain phosphoric acid (which is usually found in cola flavored beverages, despite research that it causes calcium depletion), but rather has tartaric acid from grapes. ZEVIA™ Natural Cola contains natural caffeine from kola nut and coffee. It is naturally sweet because stevia is hundreds of times sweeter than sugar, but lacks the aftertaste associated with diet soda. ZEVIA™ is all natural, sugar free, and has no artificial sweeteners, flavors, or preservatives.
Here is the link ...
www.zevia.com
ZEVIA™ Natural Cola has a classic cola taste. It does not contain phosphoric acid (which is usually found in cola flavored beverages, despite research that it causes calcium depletion), but rather has tartaric acid from grapes. ZEVIA™ Natural Cola contains natural caffeine from kola nut and coffee. It is naturally sweet because stevia is hundreds of times sweeter than sugar, but lacks the aftertaste associated with diet soda. ZEVIA™ is all natural, sugar free, and has no artificial sweeteners, flavors, or preservatives.
Here is the link ...
www.zevia.com