It’s a great storage container, keeps coffee fresh and it’s extremely satisfying to press the button. My only comment is that you need to rotate it a lot to remove the air, so maybe it’s not for everyone
This item works very well. It would work well even if you choose to not twist the lid to make a vacuum - the seal is that tight. It does take quite a few turns to create a vacuum, but it's worth it. I've not seen anything else like it in the Market.