Sometimes you can be in the middle of a desert and find out that your canteen is running low. At those times, you have to be resourceful and show some discipline so that the water lasts until you find the next river where you can fill it. It’s no time to panic and do something stupid. Don’t get cute and try to drink cactus water. Drinking the liquid inside them can cause vomiting, pain, or even temporary paralysis…not a good idea if you’re out in the desert or anywhere else. Only one type of barrel cactus contains drinkable water, and even that is a last resort. So a word to the wise, bring plenty of your own water.