These things stick on any can or bowl - I like them! If you're refrigerating some leftovers in a can or bowl, these work BETTER than plastic wrap.
What I constantly use plastic wrap for, though, is wrapping cheese to keep it from drying out in air or to keep it from molding. I have used the biggest one for this purpose, and rubber banded it around the cheese, but what would be even more useful is just some flat, thinner stretchy sheets of this same material - I could use them to wrap food like ...