I've got a bunch of loose 2032 3v button cells loose and you can't just put them back in the package. I'm sure I'm not the only one who has this problem. I can't find much product out there for the job. I use a lot of 357 cells too. Would be nice to find something that was designed to store them for my work bag.... my tool box... my range bag.... etc. I'm up for DIY ideas too. If I had a sewing machine I could modify a cheap nylon wallet. This is one of those things that drive me crazy.