So I was watching Dual Survival and Joe Teti said to drink your water because he claimed that sometimes they find dead people with water left over cause they thought they should ration it. I'm kinda not a big fan of Teti but then on Dirty Rotten Survival a couple of days later Dave Canterbury basically said the same thing. He said that your body makes the best canteen.

Now it didn't appear as though they were saying guzzle a gallon of water but more like if you only have a couple of liters.

I'm just wondering about this since both Joe and Dave were former military. Also the last Dual Survival was pretty good because they pretended they were being chased by enemies and they gave tips on hiding and "leave no trace" for the enemy to follow/find.