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!
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?