But as usual, there's no sense on just getting rid of everything that defines humans:
You might be in a small fishing boat, waiting for something to happen, it is cold, why not take some coffee out of the termo, why not have a cig, just to feel a bit like home, and wander on the surroundings?
It still sucks having nothing to sip on though. Taking a glass of water instead helps this somewhat.
http://www.ncbi.nlm.nih.gov/pubmed/20182035 https://en.wikipedia.org/wiki/Effect_of_caffeine_on_memory
Such as when you have a 5 week old baby sharing a bedroom with you. I've never been shy about drinking coffee, but the amount I've consumed in the last month is terrifying. I'm actually trying to be a bit more sensible about it after a horrible caffeine comedown recently, which could have competed with those in my past from far harder substances!