Okay....someone has to ask the first dumb question of the year so--at your service. I was following the thread last week about small cigar humidor ideas and several Brown Leafers swore by the Boveda humidifier packets. I was researching around and saw they were sold both individually and in multi-paks. Is each individual packet sealed as to where its shelf life doesn't begin until you activate it (maybe by tearing off a wrapper or something) or are they always working? I suppose someone with a massive humidor would need a bunch of them all at once so they buy the multi-paks. I want to buy a multi-pak so I have them on hand and won't have to repurchase them every 2-3 months, besides saving a little dough. Any help with my quandary?