FYI, that "recommended dose" of eight glasses a day is mythical. No scientific basis whatsoever. If you aren't thirsty, you're drinking the right amount of water.
Removed.
Yeah, that was my reaction as well. My wife and I each drink a couple liters a day. Our Sodastream is one of the best purchases we ever made. We save money, we're not lugging bottles home from the store, and it's better for the environment.
One small glass of water is about 1/4 liter. A pint glass is nearly double that. So if you drink one pint glass of water per day, that's already far beyond what they're calling "frequent".
And of course, the above is based on a person who lives alone. If there's more than one person in your household, it pays off even faster.