Or a Corning glass pot. Do not use a stainless steel pot. Nickel atoms will go into solution from the acid of the coffee. Nickel is the catalyst to the enzyme needed by E.coli to reproduce. It is a toxic heavy metal.
Milk bottles work well after thorough washing.
Instead, use a grain mill as used for producing bread flour. See the Equipment section. Or, use our emergency field distiller which requires tending every 20 minutes, but otherwise is very effective. See the equipment section. Two or three gallons of distilled water.