Removal of company paint from plastic and glass?

I have all of these beautiful high school dances favors such as picture frames, champagne glasses, and etc. with the themes printed on them such as “A Night in Paris,” “Winter Wonderland,” and ect. I have been in college for a while now , and high school really does not matter much to me anymore. I still, however, want to use these favors as dorm decorations, but I do not want the printed themes on there. I have tried all different products to remove them. I have used bleach, different kinds of bathroom cleaners, glass cleaners, etc.

I really want to just take a pot scrubber and scrape them off, but I don’t want to scratch my stuff.

These favors are made of plastic and glass.

Any tips for me?