I keep a couple of those those in my hunting pack and first aid kit. When they "expire" do they stop working or do they expire because everything expires now?
As I understand it the quick clot stuff is what expires, although it's in sealed packaging. Supposedly they will let you know just which components expire, and offer to sell you resupply items.
I don't know for sure how that works because I haven't had to resupply yet. Maybe someone else more knowledgeable can supply better info.