There is a cheap hillbilly way to raise the humidity in your Room But I warn it does look pretty ghetto.
But I had a buddy back in the day who took old bed sheets soak them in water and hung them in his tent. And every few days or when your sheet dries out keep a spray bottle of water and re saturate the sheets. Also make sure the sheet is open up and hung by 2 corners of the sheets and not one corner and have it hanging down like a wet towel on a hook crumpled up. The crumpled up sections in the sheets could be a breeding ground for mold.
I've personally never tried this but it seemed to work for my buddy. This will also help get humidity in the air faster than a pail of water would.
And also, yeah like I stated in your previous post you made, you need to ditch those clear containers ASAP.