With the invention of the Humidipak and then the Boveda humidification packs, just about any type of container can become a temporary humidor. The key word in that last sentence is temporary meaning these humidors lose humidity and are not recommended for an extended amount of time. Tupperdors, coolidors, wineadors and whatever else people are turning into humidors do not have proper air flow.
These containers need to be opened frequently to allow for proper air exchange. If not, you can develop mold or mildew in the container and ruin your cigars.
A quality wooden humidor will have a tight seal, but not necessarily airtight. A good test is to put a dollar bill across the seal, close the lid and pull out the bill. You should feel quite a bit of resistance, but you should be able to remove the bill.
Once a wooden humidor is properly seasoned and maintained, it can hold humidity for a lifetime. Things like quickly saturating the wood or dropping the humidor can disrupt the seal, but if cared for properly, the seal of a humidor doesn’t just stop working. In addition to avoiding saturation and dropping your humidor, there are some basic things you can do to get the most out of your wooden humidor:
2) Keep your cigar inventory as close to full as possible. Properly humidified cigars help maintain a steady humidity level inside your humidor.
3) Re-calibrate your hygrometer every 3-6 months.
4) Use only distilled water or activator solution to fill your humidifier. Tap water increases your risk of mold growth.
5) Replace your humidifier as often as recommended. Traditional foam humidifiers should be replaced every 6-12 months.
Again, if cared for correctly, your wooden humidor can last a lifetime.Do Wooden Humidors Lose Humidity Over Time? by Tom Ufer