Is the Google Gulp just an April Fool's Day joke?

I was searching the web on April 1, when I read on Google's site that they had released a drink earlier that day. Called Google Gulp, it is "designed to maximize your surfing efficiency by making you more intelligent, and less thirsty." Huh. Why in the world would Google even think about coming out with a drink? But of course, it's not too suprising considering that they recently came with a line of underwear! What's next?!? The same day, Google announced that their Gmail e-mail service, previously free if with an invitation, now holds 2GB of storage instead of it's previous 2GB. This I'm pretty sure isn't a April Fool's joke, but I don't know about the drink. The day after it supposably came out, I went to Wal-Mart to try to purchase some, but it wasn't even there! Come on! You say if can be found at your local grocery store! Well, if they don't have it at Wal-Mart, why would they have it any place else?