How To Use Progressive Web App aka PWA On 420 Magazine Forum
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Iso isn't safe to drink, the fumes aren't good for you either so do it outdoors, same applies to ehtanol (drinking alcohol). Isopropyl alcohol is safe to use for making oil though as it will evaporate without leaving any residue which is why it is used in sterylisation and optical/electronic cleaning. Get some iso, everclear, 151 rum and test them out, using spotless clean pyrex dish bowls of some sort add 100ml or so of the iso, cook it off on a low temp and see if there is any residue/smell/marks left in the bowl, then repeat the same for the other 2.