We’ve been asked numerous times “have reusable canning lids been tested by the National Center For Home Food Preservation” and the answer is YES.
Below is the link to a 121 page thesis outlining the extensive study done on metal, plastic, and glass lids in 2014 at the University of Georgia (UGA). Our CEO was the person responsible for encouraging this study be done, while he was the co-owner of S&S Innovations at the time.
Before anyone replies, “but has YOUR brand been tested”, please understand NCHFP does not test every single product on the market. It took several years for our CEO to convince the Director of UGA to allocate funding and resources to this one test.
That being said, the exact lid design manufactured and sold by Harvest Guard Reusable Canning Lids is the one used in the tests conducted by NCHFP.
This leads to the next question people often ask – “How are these different from the ones manufactured and sold by your competitor?” The answer is, Harvest Guard Reusable Canning Lids are the same as the first-generation lids previously manufactured by S&S Innovations, for which a patent was never issued. The changes made by our competitor to create the EZ Seal lid design are minor, but enough to qualify for a design patent, which does not retroactively apply to our design. Additionally, their new design is not the one tested by NCHFP, as referred to in the link above.