I was wondering if anyone could pitch in and give me some feedback on a question I had. I work in a lab and we go through a lot of reagents, some of which come in 4 liter glass jugs. I've started re-using the glass jugs that contain ethanol and wash them out really well because I know some of the chemical companies put an additive in it that makes it undrinkable. The guy at my local brew shop advocated this collecting saying that glass is non-porous, therefore it should be safe as long as I'm safe while cleaning them out. I don't see any problem, does anyone else? We also use some more hazardous stuff and was a little hesitant to re-use those bottles. Just being paranoid? Thanks for any feedback.