Yeah, this was the day Sam gave him the special water, as they were clearly worried about how dehydrated he was from only drinking coffee and then getting drunk. He clearly got the sparkling water thing from the Tates, too... as they both regularly talk about sparkling water and how they don't trust men who don't drink sparkling water.
I have no way of confirming it, but I do suspect that not all of the Zipp cans actually contained Zipp and some contained water instead so that they could keep them hydrated.