boil water warning and middle schoolers

This week a water main burst near my school and we were on a "boil water alert" until the water was clear again. The water fountains were all covered up with garbage bags taped over them. I had to warn my middle schoolers not to drink water out of the bathrooms or try to stick their heads under the bags to get a sip or else they would get diarrhea for sure- (they love it when I say diarrhea!) Of course as soon as you tell someone that they cannot drink water, they get very thirsty. When they would start to whine to me, I would remind them that we just got back from our nature field trip and what did we learn about surviving in the wilderness? Which would cause them to hang their heads and reply "that you can live for 3 days without water" and sit back down in their chairs. Well, today was the 3rd day of the boil water alert and I was just waiting for one of the kids to tell me that it had been 3 days and they were getting ready to die of thirst, but at about noon, they said it was OK to drink again. And they all cheered and ran to the water fountain to celebrate!