Great for camping, power outages, or your off-the-grid cabin in the woods. A perfect gift for the coffee geek in your life. The cup, lid, and handle are made of stainless steel. The grinder is ceramic. The grinder will come set to a very fine grind. To adjust the grind size: Remove the gold nut, the handle, and the round piece under the handle.Screw the gear shaped piece up and down the threaded rod. You will see the 2 pieces of the ceramic grinder moving closer or farther apart.