I'll probably pick up a dozen for the blends that tend to get a bit of light. I try to minimize it, but some of them end up getting exposed to light just to keep access to them easier. I'm also living in a studio at the moment, and finding dark places to hide tobacco is getting harder the longer we live here and accumulate stuff.
How well do you think these would work if their claim of 99% blocking lives up? Could I leave them on my desk without issue? I normally keep them in the box they come in since it covers almost the entire jar, but I'm just curious.