The main reason the safety cans are preferred is the self-closing feature. You step on the lever to raise the lid and it closes when you step off. In theory that somewhat negates the “idiot” factor. The main thing you need is a tight fitting lid. Being completely airtight isn’t a necessity as long as you get a fairly good seal. If you know you’ll be staining, put some water in there as well and that will keep things in check. Even in water the stain will set up after a while and the rags can be removed, dried, and thrown away. As long as you keep an eye on things, you’ll be in good shape.
Artisan Woodworks of Texas- www.awwtx.com