Wisesorb 40 Gram Pack of 5 Silica Gel Canister, Gun Safe Dehumidifiers (Orange to Green), Reusable Desiccant Moisture Absorber for Car, Closet

They work exactly as described. Color changes from orange to green. They're reusable but one downside is the time needed to dry the silica gel: 3 hours in an oven at 250 F. I use 1 in my car and 1 in my camera bag. Instead of an oven I use an air fryer. Air fry for 15 minutes at 250 F and leave them inside the fryer for about 10-15 minutes with the air fryer turned off (while it's still hot inside). Repeat that 1x to 2x if necessary. So that's a maximum 45 minutes air frying with 10-15 minutes breaks in between. They become dark orange when completed, ready to reuse.

These Wisesorb silica gel canisters work exactly as advertised. I use them in my gun safe and tool cabinets, and they effectively absorb moisture without any mess. The color change from orange to green makes it easy to know when it’s time to recharge. I appreciate that they’re reusable—just pop them in the oven and they’re ready to go again. Great value for long-term moisture protection. Q&A Section: Q: How do you know when they need to be recharged? A: The beads turn from orange to green to signal it's time to recharge. Q: Can these be reused? A: Yes, they are fully reusable—just bake them at low heat to dry out the moisture. Q: Are they safe to use in gun safes and closets? A: Absolutely—odorless, leak-free, and compact enough for tight spaces. Q: How long do they last before needing recharge? A: It depends on humidity, but generally they last 2–4 weeks before needing to be recharged.

I bought the Wisesorb 40 Gram Silica Gel Canisters to use in my Kobra S1 ACE Pro filament dryer, and they’ve worked perfectly. They keep the humidity under 39% most of the time, which makes a huge difference in print quality. What I love: Reusable: Just dry them out and they’re good to go again. Practical for 3D printing: You can even 3D print a holder to attach them to the roof of the ACE Pro, which makes them super convenient. Great value: A pack of five lasts a long time and gives plenty of coverage. These are awesome little canisters and do exactly what they’re supposed to. If you’re looking for a simple way to manage humidity in a filament dryer, I highly recommend them!

Have to recharge these frequently but work as described. If you have a need to have lots of these you might use the containers and buy bulk refills so you can store your wet ones in bulk and only recharge once a month. I purchased these and made them open friendly so I could replace the beads and save recharges to one time every 6 to 8 weeks. This plus a large container of the same type silica red green.

Bought to keep paperwork and other items in my safe from getting moldy or stale, and all the moisture kept out

Love it thanks

These are super convenient and they do the job really well.

One of my canister was delivered defective.

These are awsome. Keep your valuables dry and safe. Also reusable!

Tried these and they worked well. Problem is, they're not changing colour when I try and re-activate, this is frustrating. I assume they're not working after the first use then :-( Tried support and and I'm getting rote replys, very unhelpful and it takes days to get that......

These are working as described and are very useful - especially the way you can put them in the oven to refresh them.

The items match the description and the delivery time was exceptional. Cannot verify on the product's functionality until some time passes but feel confident.

Excellent! Work very well in removing humidity from car in the winter weather