You know, the ones that come with cigar orders. Do they go bad or anything? Some of mine are getting to be over a year old. I mostly use them in my smaller humidors or zip lock bags.
They can last a pretty long time. I usually throw em in my cooler and pull one out when mailing a box. Seems like once they dry out completely, they can be hard to recharge (if they're old). The crystals dry and clump up and don't take in water as easily. Until then, they work like champs, sometimes for years.
Thanks for all your responses. Looks like I can keep refilling them. Maybe we should rename them energizer bunny pillows - they keep going and going and going:)
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