I had tried both Heavy Duty Reynolds Wrap and Reynolds Wrap to boil water and all I get is leaks through the foil. I experimented with several new rolls from the store and all leaked while trying to make a bowl to boil water. I held the foil up to the light before I started and no small pin holes, but after adding water it degrigated the material real fast and caused small pin holes. I went to there site and they basically shy away from water. Does anyone know of a replaceable material I could use that would store flat and use as a emergency pot for boiling water or cooking on besides going to a Titanium cup?