If you get into canning a lot, one thing you might want to look at over time is adding some Tattler reusable canning lids to your collection. They do take a bit of getting used to, for sure, compared to the one-piece metal lids. But they work with all your regular canning jars and rings. A Tattler lid in Canada is about a dollar a lid, and you can use it forever. A Bernardin lid is about 30 cents (unless you luck out on a sale) and they emphasize over and over they only guarantee it for a single use. 30 cents adds a LOT to the cost of that jar you just made; sometimes it's more than I paid for the ingredients in the jar. Anyhow, after three uses of a Tattler lid, it's paid for itself, and from thereon in, it's gravy. I particularly like them with high-use stuff like soups, etc, so they get freed up fast for more rounds of service. (As opposed to on a jar of say cranberry sauce, where they might linger for a full year till the holidays come round.)
Here's some info I have compiled on these lids, pros and cons and quirks, etc: http://www.healthycanning.com/tattle...r-home-canning
Note that the National Center for Home Food Preservation is currently conducting a study on Tattler lids.
p.s. OH, and always only gift jars with metal lids on them, until you know for sure the person is a good jar returner. I had a few idjits toss my Tattler lids in recycling and I was p*ssed lol.