Zerust rust prevention

I came across Zerust drawer liner on Rockler tools, so googled the brand. They also make these capsules, which would be good for a razor box. Has anybody used any of their products?

Amazon.com: Zerust VC2-2 NoRust Vapor Capsule - Pack of 4: Automotive

Not me,,,,,,,,,,,,,:shrug:

I haven't used it either. But I thought the same thing when I got my Rockler email today :)