Review on Hornady Reusable Canister Dehumidifier: The Ultimate Moisture Absorber for Gun Safes & Cabinets by Brandon Ball

It does what it's supposed to. Placing it indoors will keep it at a lower humidity level than a large outdoor area. After a few weeks the color changed. After a trip to the oven, they changed color again and were ready to go. Looks like they could last 3-4 weeks in my environment before I have to oven dry them again. Although there are no problems. I'll just find a time when the oven is still on (at 300 degrees or less) and put it in.