I'm old enough to remember Fizzies: tablets that were promised to transform mere water into an effervescent soft drink. They showed up on my radar when I was five, at a time when impatience stood between me and the full Fizzies experience: I couldn't wait for the Bromo-Seltzerlike tablet to dissolve completely, so I was rewarded with little flavor and lots of undissolved sugar shards. At my present age, I would be likelier to drop a Fizzie into a glass of water, walk away, and forget I had ever done so.