I think I just hit the Geek Schwag motherload. Here is a new line of Google branded drinks called Google Gulp (BETA)™ - (How long it will stay in beta is a different question) -

This brand of drinks comes in four different flavors and is supposed to quench your thirst and keep you searching, not a bad promo. Of course a similar promotion could be done with custom bottled water, which is probably healthier for you to begin with.