Would not even give one star if that was a possibility. These have not helped at all in a closet with strong body odor. And have put them in the sun to rejuvenate even though brand new. As noted in this article, there does not seem to be a way to contact the company.
The Facebook post intimates you are using an essential oil. Nothing to do with EOs. Rip off!
Bottom Line: No, I would not recommend this to a friend