However, these ZEVIA ones have no calories at all and they use a substitute sugar called Stevia (from a plant) and they are much sweeter than sugar.

Be careful with Stevia if you have low blood pressure, it seems that Stevia has some chemical that reduces blood pressure in some people, which might be ok if you have high blood pressure, but dangerous if u have low blood pressure...

Out of all the sugar substitutes, Stevia is one that I mostly trust... Aspartame is god awful!