Abstract: A bottle for creating a carbonated beverage by combining an effervescent composition with an aqueous liquid disposed within the bottle includes an interior sidewall defining a cavity and a cavity opening, a removable lid configured to interface with and seal over the cavity opening (the removable lid having a spout), and a cap configured to form an airtight seal over the spout. The bottle is pressure-sealed when the removable lid seals the cavity opening and the cap seals the spout. Effervescent compositions can include about 41%-64% by weight of an acidic component, about 25%-51% by weight of carbonate or bicarbonate salts, less than about 15% by weight of one or more sweeteners or flavors, about 0.05%-1% by weight of an anticaking agent, and optionally less than about 2.5% by weight vitamin supplement, all weights based on a total weight of the composition.