Well, I assume that if somebody sells a container to be used for chemical storage that it is capable of storing chemicals. It does that quite well, without fault as far as I'm concerned.
There are many theories to why the accordion bottle may or may not work. Material, construction, thickness, ability to purge oxidizing air, cap seal, light filtration, response to heat and humidity, chemical resistance... Many factors can affect how the bottle will work. Should I form a hypothesis for each and every one of those, and then debate within or do research to figure out whether I think it will work? Or should I just go ahead and use it? You're making it too complicated to buy a bottle to store chemicals in, Brad...
I don't want my brain to hurt. I want it to have a good time.