I couldn't watch their videos....too much 'rambling'.
From Science Madness.org discussion on this subject: "The NaOH must be a molten solid to eat through the glass. Sodium hydroxide solutions, depending on their concentration, may etch or weaken glass if heated.
Your experiment only uses a sodium hydroxide solution at room temperature, and that does nothing to the glass. If you heat it, the glass may be whitened or streaked. If you want to completely destroy the glass, you need to heat sodium hydroxide until it is molten in a solid state."
Now it may take a few years for lye to damage the glass, but that is only one contributing factor to not using glass. Another one is 'thermal shock' aka abrupt temperature changes. And when you add Sodium Hydroxide to room temperature Distilled Water...the water almost immediately increases 150F in just a few seconds. And let's not forget the various implements that we use...stick blenders, whisks, spoons, beaters, etc. Unless you are using plastic and silicone, you're creating scratches in the glass.
Maybe it will never happen, but what if it does? Is it really worth it when it's just as easy and safer to use plastic or stainless steel. Bad enough you have a hell of mess to clean up regardless of whether it's due to failure or an accident, now you glass to worry about.
