title_body: What is the purpose of a coffee press?
upvoted_answer: It's a French press.
  
  Put ground coffee inside it, pour hot water, stir a little bit, and then wait for 2 to 4 minutes (or longer if you want a strong and bitter coffee).
  
  After waiting, use the pump to filter the ground from the coffee and pour the coffee into your mug.
  
  I recommend using coarse or medium ground coffee, otherwise, the coffee will go through the filter and will end up in your cup (and mouth).
  
  Some extra information here.