How can flavored water have 10 calories per bottle but 0 per serving?

Question

How can flavored water have 10 calories per bottle but 0 per serving?

In: 0

Answer 1

FDA regulations allow the seller to put “0 calories per serving” if the serving is less than 5 calories, and rounding to the nearest 5 or 10 in other circumstances.

If the whole bottle is 8 calories for two servings of 4 calories each, the label will have to round up to 10 for the bottle, but allows rounding down to 0 for the serving.