So I picked up a cooler

[CigarNut]

Originally Posted by T.G

Active humidifier in a sealed plastic box (cooler) is just begging for problems unless you like things really moist or you happen to be in and out of there a lot. In which case, you probably would have to deal with condensation near the outlet of the humidifier. Great if you like your cigars stored in a swamp.

Adam is correct, plus active humidifiers can drive the temperature in the cooler up. All-in-all, a bad combination for your cigars.