I've been doing a test on cell rot. I've kept this one in a air tight bottle, for several years. I check it yearly, and stored in my shed.
Here's a pic from last year.
Attachment 338186
I put I fish hook in it, too see how quickly it reacted to the gasses. That was 3-4 years ago. Nothing I could really see the first year, but it was , last year. I won't open again, till spring.