EXMAX® Blue Indicating Rechargeable Silica Gel Beads(2-4mm) Desiccant Functional Reusable Hard Plastic Canister Humidity Moisture Absorb Box Dryer for Camera Microscopes Telescopes,leather, shoes, - 2 Pack

Easy to use. Keep a few each in my £D filament box and reset when needed. Cheap and simple.

I wanted a device like this that could dehydrate the surrounding air. Using a humidity meter nearby I had the two boxes close by in a very small room. The colour did not change. There was no evidence at all of any dehumidifying effect. Very disappointing.

I ordered two of those and decided to test one by pouring water over it. It soaked everything, I repeated the process once more so it's as saturated as it could possibly get. Three hours later the beads are still blue.

A very useful product, easy to use and store.

great

When you open these up (not easy) they go everywhere. Will never buy again. Stick to sachets.