The only plastic containers I throw out are like the 12 oz Pepsi bottles (when I even drink it).
But I have scads of the 1 qt gatorade bottles filled with water. And being a home brewer who likes to brew hard cider, I must have 50 plastic cider jugs full of drinking water.
When I use up a think of like laundry detergent, I just fill it with water and don’t even bother rinsing it. The reason?
Now I have some soapy water to clean stuff with!!
My rule is basically if it is in a jar or jug that originally held foodstuff, like OJ or cider or whatever, then its potable water.
Anything in other containers is utility water.
THAT’s what I do, too....bleach containers, etc...fill them with water...and stash them, with the date.....I rotate once a year. I suppose I wouldn’t have to rotate “cleaning” water....but, I have.