Things that will kill you:

• Three minutes without air
• Three days without water
• Three weeks without food
• …oh, and Three hours without coffee… right? 😀

But there are always exceptions:

• In cold water, there are reports of survival up to an hour without oxygen. Freedivers manage up to four and a half minutes (22 minutes when not diving to depths), helped by the mammalian diving reflex (and some preparation like oxygen saturation)
• And if you’re unfortunate enough to be in an Austrian prison in the 70ies, you may have to try to survive without water for 18 days… although, there may have been some wall licking going on there…
• If you are overweight, you can survive much longer than twenty one days without food
• The coffee, however, that’s an absolute! 🙂