We use a single burner butane stove to heat water in our boat, it will boil a large kettle of water in about 4 minutes, then we fill a 2 liter thermal pump hot pot with the boiling water and make coffee at the same time. The Zojirushi brand thermal pot will keep the water at about 160 degrees for 24 hours giving us utility water for cooking and washing throughout the day, and for face washing the next morning. The butane stoves are available almost everywhere for $40-$80 (Westmarine, Walmart, kitchen stores, etc) and the butane cannisters should be around $4 each. We get them at Ace Hardware. Rich & Christie