I have this insulated bag for bringing home refrigerated groceries, and one of the seams started to unravel.
So I dug out heavy-duty needle and button-and-carpet thread, put on my ring thimble, and sewed it shut with messy backstitch. I overlapped my seam on the ends of the original seam that were intact.
Then I looked at the brand label and picked it off with a seam ripper because I don’t like advertising companies just by carrying their stuff.