"Selling water by the ounce!" What a marvelous idea!
Figuring that you can buy a gallon of water for $1.00, these little numbers could sell for two cents each and they'd still be making about a half cent per serving.
Hey, that looks like a great idea. I read the article in your link and all kinds of things can be put in them, including cool-aid. Hope it's reasonably priced as that will help market it. I'd love to try it!
The man who patented sliced bread never got anywhere with it, so I'd say this: It is all up to their marketing department. You can sell any sh!t if you let people know it makes flowers grow.