Filament Drying Desiccant (3 Pack) by Slice Engineering | 10X More Powerful Than Silica Gel | Infinitely Rechargeable | Prevent Wet Filament | Fits Perfectly Inside Spools | Made in The USA

This is a simple solution to filament desiccant. Dry a roll of filament, place one of these in the middle of the roll and seal it up with a vacuum bag.

Works well to absorb moisture in my filament dryer.One thing not shown in the photos is that the cylinder is only open at one end.I'd imagine this would work better and have better airflow if their was a mesh-covered opening on both ends to allow airflow over the desiccant beads but it's only open at one end.I might try disassembling it and drilling some holes in the back.

Used for filament storage. Works great.

I have these in a vac bag and see to help keep the filament dry.I really need a longer test, but the cards that come with them has not changed colour to warn me of high humidity.

Work far better than silica gel

These are absurdly expensive for what they are, but they do work very well.Currently using them in the Bambu Lab AMS and they fit great in the bambu filament rolls. They fit fine in prusament rolls, but are off angle because the inside of the roll is larger than the spool opening.Haven’t tried recharging them yet but i’m sure they’ll do fine.I did have an issue with the top popping off if I dropped it on the table/floor. Easily fixed by taping the lid to the can.

Great

While the activated alumina is a good desicant, I don't see how it works in this application.I placed a container inside the hole of a Bambu Lab PETG roll, bagged the roll and pulled a vacuum with a small pump. The bag eventually formed over the hole and was pulled inside the hole and formed over the mesh end of the container, practically sealing if. It's like putting the container inside the spool hole with the cap on.I am considering returning this 5 pack. Sorry!UPDATE 02/04/2024I believe I came up with a solution to the problem of the storage bag sealing the mesh opening of the container. I 3D printed a disk featuring a 3mm raised circle with a couple of 3mm ribs inside. The circle's diameter is slightly bigger than the diameter of the filament roll hub. This side of the disk will face the mesh opening and will prevent the bag coming into contact with the mesh sealing off. Now the desiccant container can breathe into the roll hub and from there into the layers of filament. The disk is locked in place when the bag presses against it under vacuum.UPDATE 02/29/2024Three out of the five containers have caps that pop off easily. They do not attach well. When putting on a cap and tightening, the dimple is supposed to stop at the end of the groove. For these 3 containers, the dimples just go past and around. Feels like very poor quality. I'll try a replacement before returning for refund.