Reusing canning lids
I know this is a big no-no but I still do it. It used to be you could reuse them easily because they weren't so fragile. The new silver ones are hard to reuse because they always dent when you remove them from the jars.
I no longer reuse them for canning, but use them for vacuum packing sour cream, mayo and cottage cheese that we buy in bulk. I make yogurt in pint jars for my dogs and use them to vacuum seal those also. I only use the ones that are not dented (or ones I can fix) and can get a seal most of the time.