Single use, shmingle use. You can use them until the edges are noticeably bent-up--we did all the time when I was a kid, and they did not seal nearly as badly as the agricultural department and Ball marketing would imply.
Tattler lids have a trick to them--finger-tip-tight, then turn back a quarter turn and load the canner. After they come out of the canner, wait five-eight minutes, and then gently tighten the rings. We get much better seal rates since someone actually read the instructions. They still work better in the boiling water bath canner than they do in the pressure canner, and I prefer to use them on stuff you can re-cook (like syrup, jelly, applesauce), but they do work.
And, of course, you know those glass jars you buy things like spaghetti sauce in? Yeah. Those metal lids will re-seal, with very good rates.
My mother is a cheapskate, and I am her disciple.