The Zodi Outback Gear Zodi Fire Coil uses your camp fire or camping stove to heat unlimited amounts of water. Fill an elevated water container and connect the coil. Put the coil in the fire and let the water run though it into a second, lower water container, heating up on the way. For super hot water just repeat the process. The heating coil is super durable and lightweight so it's a great water heating system for camping, hiking, mountaineering and travelers who wish to keep their gear light.