Do the wooden slide top snuff boxes like the ones they sell on MrSnuff hold closed really well? My job involves a lot of moving around and other physical activity so I need to know if I kept one in my pocket would it stay closed tightly?

Yes, a little to well when they are new. Darn hard to slide but they get better with time.

Heartwood snuffboxes are all I use these days!

Im a millwright so I’m climbing all over industrial machines all day and mine stays plenty closed!

I’ve got three tripletecs, a double and a single by Patrick Collins. All are trouble-free. The single is my favorite, very pocketable.