Solar “Bottle in Bottle” Water Heater DIY – plastic soda bottle heater – heats food too!
How to make a “bottle in bottle” Solar Water Heater. made from 2 and 3 liter plastic bottles. only 2 or 3 bottles required. heats water and some foods. temps over 150F can be reached in about 2 hours. very easy to make. good way to re-use or “recycle”. Of Note: That temperature will pasteurize and rid the water of harmful pathogens (most start to die when water reaches about 130F and all are dead at 150F)