Seltzer was an Earth beverage. It was one of the items sold at Pops Candy Store in 1893 San Francisco. (TNG: "Time's Arrow, Part II")

In 2152, T'Pol ordered carbonated water from a drink dispenser on Enterprise NX-01, prompting Dr. Phlox to quip, "Now that's adventurous." Instead, a gooey black substance came out. (ENT: "Unexpected")

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