Review on KAMOTA Mason Jars 16 OZ - Perfect for Meal Prep, Jam Making & More! 12 PACK with Regular Lids & Bands, Whiteboard Labels Included by Charlie Maadhadians

I bought a set of 12 16oz cans and had a few issues with them. One jar pictured had a defect preventing it from being used for canning or anything else as it leaked with the lid closed. I had to throw that can away. Almost all the rings are so tight that they catch on the can and, if you don't remove them, accidentally tear off the lid when checking for leaks. This is (obviously) a huge problem after processing. I had to re-preserve 3 of 12 jars because of a ring issue and was unable to test 4 more because of the same issue. One ring didn't even hook properly and popped out while I transferred the hot tomato sauce to the cannery. Luckily I didn't get burned and was able to use another ring. At least I found it before the preservation because otherwise I would have lost all the content. On top of that they send you a 1 year guarantee offer but the website is down so you can't register on it. I've emailed them but I'm not holding my breath. (Edit: They responded to me fairly quickly and offered a replacement or partial refund for my issues. I took a partial replacement which was processed quickly! Customer service was very good.) TL/DR: Pros: Great packaging, lids are in order and sealed, the shape of the glass is pleasant. Cons: 1/12th of the glass had a defective rim causing it to leak or be watertight. Rings 1/12 popped out when lifted. Many rings are so tight or have defective threads that they open the jar if you remove them, making it difficult to unscrew or open the lid.