Do you ever store dangerous liquids in old drinking containers? Ex store bleach in water bottles or gasoline in 2L pop bottles?

No I don’t do that. It is very dangerous. Heard of someone that did it at the university, put some cleaning chemical in a soft drink bottle and forgot & took a sip and had to go to the hospital because of it.

This is what sane people call "a significant red flag"

That is dangerous if you have small children.
Even in our workplaces, we have regulations about how hazardous items are stored, and dispensed.

Liberals tend to do that.

There's a BBC programme I saw when I was a kid where a 12 year old girl drank bleach by accident, her mother had it in a lemonade bottle in a press under her kitchen sink, the child was out playing on a hot day, ran in looking for a drink, remembering seeing lemonade in there she took a huge swig, she was destroyed for life, all her esophagus was burned and she could no longer eat or drink through her mouth😢😭

I have mixed up a homemade cleaning solution to clean the shower (Dawn, vinegar & water) and put it in a glass jar and keep it in my bathroom cleaning bucket. Pretty sure no one is going to try to drink that.

Only plant food and it's clearly marked as Poison ☠️, only use it to mix and pour it out in plants as don't want to contaminate anything else.

No, I'm not stupid enough to do that. That person you live with needs to STOP doing that - or be evicted or you move out.

No, I thought everyone learned how stupid and dangerous this was back in the 80s

No I dont

Only for a quick measure and transfer. That plastic is way too thin for long term storage.