I have an idea, it is a clay product that holds two different things that should not be mixed until the right moment. I want to make a clay container for water, that also has a second compartment for water too, but, instead of filling both sides with water I want to have sticks and rocks and char(lint, etc) for making a fire. Hence the fire on on side and ice(water really) on the other side. It could be glazed inside to protect the clay from absorbing the water. The sticks and rocks could be removed to make a fire, then, once our thirst was quenched the remaining water could be used to put out the fire. What do you think?