Tattler lids come in two parts: the plastic lid and a rubber gasket seal. Combined they make an excellent seal and each rubber gasket will last approximately 20 canning cycles. The seals are super reasonable (about a quarter a piece) to replace. They are BPA free and made in America too! If you buy in bulk you can save even more.
I have added 200 regular and 500 wide mouth Tattler Reusable Jar lids to my wish list along with some replacement seals. You can find them at the companies website http://www.reusablecanninglids.com/, and find many of their products sold with a discount if you choose to buy in bulk.
Have you used Tattler lids? If so, what do you think are the pros and cons of using a reusable lid?