title_body: How can I make coffee without a machine?
upvoted_answer: Cold brew, SUPER simple version. A.K.A. my college days version. 
  
  One tbsp of any coffee per cup of water. Let it sit in the fridge for about 12 hrs. Pour and drink. 
  
  In my college days I got a half gallon milk jug. Washed it out of course. Which is about 8 cups. I would put 8 tbsp of any coffee I could get my hands on and put it in the fridge over night. No heating water, no other preparations, no shaking, nothing. 
  
  The next day I would fill my coffee mug and put 2 sugar cubes (about 40 calories BTW) or honey into the cup and microwave it to a drinkable temperature. When you get close to the bottom it will be like mud, full of coffee grinds. I would just toss that out and start the next one for the next day. I think I calculated that with the cost of the sugar cubes and coffee it was like 15 cents per cup.
  
  Tips: the thought that more coffee will deliver more caffeine is true but I found that a ratio of more than 1.5 tbsp of coffee per cup of water can make it to bitter to enjoy. Plus I found that the time in the fridge does not have to be precise if you stick to the 1 tbsp to 1 cup plan. There were times when I left it in there for 20 hours and it was still drinkable.