Oxygen escapes in unopened packaging!

A good idea with oxygen in the can in case of emergency. Only problematsich when in an emergency the can is empty !!!
After approximately 1 year, I noticed that the - still in their original packaging, unopened - very easily felt can. I made a review of the pudding and found that the box was empty. It may be that the can was empty much earlier. A Joke!
Actually, no more than zero stars!