Polymaker PolyDryer Filament Storage Box Only (No Dock), Airtight Moisture Proof 3D Printer Spool Container with Hygrometer for 1kg PLA PETG ABS TPU Nylon, Feed & Print Directly Without Breaking Seal

I love these dry boxes and their drying base. These things have an excellent seal on them and work brilliantly on the rare occasion I need to print out of the storage box. They come with everything you need including a bar to mount the spool on which makes it a LOT easier on your extruder motor when printing directly from the box. I buy at least one every time they are on sale, very happy with these!

The PolyDryer system has become my go-to for keeping my filament dry. It’s convenient, works well, and there’s lots of add-ons to print for the system. My only complaint is the price, while it is convenient to be able to dry your filament and keep your spills within its own dry box, these are quite expensive compared to making your own with cereal containers. I try to buy these when they’re on sale, and aside from the price, these are my recommendation anytime someone asks for suggestions on a drying system.

The system is good, but not perfect. The elephant in the room is that the dryer is loud and takes hours to do the job. Think hair dryer in the next room over. its not LOUD, but it does constantly draw attention to itself. If you can put it in the garage, laundry room, anywhere you don't have to hear it or just not be home while its running, it does the job capably. The dry boxes themselves work wonderfully for keeping the filament dry for long periods of time. The one hooked up to my printer right now is at 15% moisture and was dried 2 months ago. The construction quality of the dry boxes is much much better than i had expected. very rigid i think it would take a deliberate effort to break one. Other reviewers have complained they are somewhat difficult to open, while accurate i don't think this is a bad thing as it makes a very solid seal between the lid and container. You should only need to open it to replace the spool once depleted. This will not accidentally come open, even if you drop it. Getting the most out of this system. The filament dryer by design will not get hot enough to completely dry the desiccant because that could damage the filament. The desiccant changes colors to indicate how much moisture they've absorbed, after a certain point they can no longer absorb any more moisture. after seeing other reviewer images, i think a commonly overlooked component is drying the desiccant itself before putting it into use in the drybox. simply emptying the beads onto a paper plate and microwaveing them on defrost for 9 minutes works very well and can be repeated as needed for the life of the drybox. additionally this system works best when you remove the drybox from the drying station and cap the drybox after a drying cycle, it does not have a air tight seal to the drying station and leaving it sitting on the dock permits moist air to seep back into the container as it cools. Above i have a comparison of two dryboxes set up 1 day apart, you can easily tell which one i dried the desiccant in before hand and which one i just put together and put on the dryer. My my minor critiques are that the system does not have a rear facing port so if you have your set up like mine your moisture gage will be facing away from the front of the machine. The dryboxes come with a length of PTFE tubing but its a larger diameter than what most machines use so if you want to connect your drybox directly to your printer you will need to supply your own tubing i'd also like to see a future revision with a spot for additional desiccant beads in the rear of the drybox. Overall i highly recommend this system if you can live with or work around the noise issue.

The PolyDryer system is a total game-changer for anyone tired of the constant battle against filament humidity. The standout feature is undoubtedly the modular design; unlike traditional dryers that pull double duty as a single-spool feeder, this system allows you to decouple the drying unit from the storage containers. Being able to purchase additional sealed storage boxes means you can dry a roll, snap the airtight seals shut, and move on to the next one without leaving your filament exposed to the air. It’s an incredibly efficient workflow for those of us with growing "filament graveyards" who need a scalable way to keep everything crisp and print-ready. The build quality of the storage boxes themselves is impressive, featuring robust gaskets and secure latches that inspire actual confidence in their airtight claims. They aren't just passive bins, either; the integration of a built-in hygrometer and a dedicated desiccant compartment turns each box into a high-tech fortress for your PETG or Nylon. Having a fleet of these boxes allows for a "set it and forget it" mentality—you get the professional results of a dry box setup with the flexibility of a modular library.

Works great with my PETG filaments. It maintained the humidity at 38%. Great value for the money. I have been using it with Sunlu PETG filaments and mo clogging issue. Very easy to install and use. Compatible with Sunlu spools.

I have been drying filament in a modded food dehydrator for a long while now and it has been fine for PLA and PETG, but lately I've been printing more TPU and switching between spools more, so it's gotten to be more inconvenient. I saw the PolyDryer system on YouTube and liked the two-part approach: a "Dryer Dock" for heating and a "Storage Box" for both drying and long-term storage, so I gave it a shot. After using it for a few weeks, I can say it's a solid solution that addresses many of the pain points I had. What it does well: - The base heater unit (Dryer Dock) does the job well without being flashy. The simplified 3 heat settings and an adjustable timer make it rather straightforward to use. The chart with common filament settings being a sticker right on the dock is a nice touch that saves time looking up settings. Really couldn't be much easier than this. - The storage box box seals well and accommodates all my usual spools. It includes rollers for the filament to spin on, plus an attachment for center-hole support. I don't typically need to use the center hole, but it seems like a thoughtful touch. The boxes do stack on top of one another well, but they don't latch together. They don't seem to fall off of one another sitting on the rolling table I have two X1Cs printing on, for what it's worth. - You can feed filament into a 3D printer while you are drying with this system, or while the filament is stored/sealed to keep it dry. This is especially useful for very hygroscopic materials, but it's also convenient for even moderately hygroscopic filament since you don't have to dry it before each print. - During drying the included hygrometer lets you know how wet the air is inside the box since it and the color-changing desiccant are visible through the front of the box. And since the same box is used for long term storage, both act as a nice at-a-glance check to ensure the filament is still dry without even removing it from the shelf. - Two exit holes with included PTFE tubes make it easy to guide filament from the box to your printer. The air in the box stays remarkably dry after the initial drying process. What could be improved: - There's no way to switch the temperature or mode mid-cycle without either letting the timer run down or turning it off and on again. It's not a deal-breaker, but it's an odd omission. - The lid latches are extremely firm. While this ensures a good seal, it might be challenging for some users (like children or those with arthritis) to open and close. **Addressing some misconceptions:** Some reviews I've seen seem to misunderstand what they're buying or have unrealistic expectations. Let me clear a few things up: - There are two options in the listing. You can get either the storage box alone, or a combo with the dryer dock and a storage box. You only need a single dryer dock (though having more lets you dry more spools simultaneously), but you'll want a storage box for each spool you want to keep dry at a given time. This modular approach makes more sense than a single bundled offering because you typically need more than one storage box. - Noise Levels: In my experience, the beep isn't excessively loud, and the fan noise is reasonable for this type of device. I've used other food dehydrators and filament dryers that are much louder than the claimed 41dB. - The LCD display is functional and easy to read from most angles. While it's not a fancy full-color display, it does the job without introducing unnecessary complexity that could lead to failures down the line, and I appreciate that it keeps the cost of the unit down. - Some reviewers have compared this to units with more "granular" temperature controls. In practice, the three-setting approach, combined with the provided chart, works great. The additional settings of other units are really not any different than the dial on a cheap food dehydrator which often leads to false precision rather than better results. This all said, who is this good for? I think if you're willing to plunk down a bit more than you'd spend on a basic food dehydrator this is the way to go. Dedicated filament driers are rarely providing much more than added convenience, but the PolyDryer system is a well-thought-out solution that addresses the real world inconveniences of 3D printing with hygroscopic materials without getting caught up in unnecessary bells and whistles. It's a tool that does its job well without being flashy, which is exactly what I needed, and you might as well.

The polydry box is very good. I tossed the provided dessicant, and went to color indicating desiccant. I added a couple of drawstring mesh bags filled with dessicant and tuck it in under the lid when it is not in use, it drives the humidity down to 15% in about 24 hours. I live near the ocean with foggy nights, so pretty damp. I added a 10mm hole out the lower back and relocated the grommet and tube for use with my Ultimaker printer, it feeds smoothly with the nice bearings. My prior home made box only stayed dry for 4 days, now the polydryer box seals are excellent and holds the dry level for several weeks at 12-15%. The PLA material no longer turns to glass and breaks apart when humid/wet, the PLA stays compliant and useable and this box really extends the useful life of the print material. The print jobs have been very consistent with no threads, reliable prints every day for weeks. Being clear all around, makes it easy to see the material level. The humidity sensor is a nice touch. Bought a couple of extra containers.

Just got it but very impressed! The Good * Very sturdy construction * Sits flat * Grippy feet - doesn't slide around (Excellent!) * Super strong gasket seal * Bearings seem great, rolls very smooth * Included bar just in case spool is damaged (so you wouldn't be able to use bearings) this bar has a guide that it sits on - super nice * Included reusable moisture beads (more environmentally sound, less trash) * Humidity readout * Excellent packing (all cardboard and only 2 plastic bags total, one of which is reusable) * Ready for their dry base module The Not So Good Honestly the only thing I can complain about is they give you a teflon/bowden tube but it is really thick and won't fit any 3D printer I know of. Overall pretty minor complaint but I can't use this tube so it becomes trash. My Suggestions for improvement * Swap to commonly used teflon/bowden tube sizes and up to 18" to 1 meter in length * Make these dry boxes stackable (that would be super convienent! Other than epic job, these things are great!

Nice boxes Plenty space

Outstanding product. Packaged very well and secure for shipping. Printing mostly PETG, they keep my filament in a perfectly workable state after dehydrating. The digital hygrometer is very responsive and accurate enough for the use case give or take 1-5%. They are nice and compact fitting nicely on shelving for storage. I am a little worried about the clamping sides as they are slightly tough to snap on and engage. Putting the lid on slightly wrong may result in breaking those clamps. I would keep an eye on this. The filament holes on the top and front are great for their use case. I look forward to purchasing more of these as my color library continues to grow. Highly recommended 5 Stars.

These dry boxes and drier work great. They keep my PLA filament down to 10% humidity. The fact that I can use the storage box to hold my smaller spools that don't fit well in my AMS is great. I can hook the box directly to my printer and feed the filament from it. I had one warped box, but Polymaker customer service was quick and great. They provided me with a new box and also gave me printing tips for new material. Highly recommend Polymaker .

Eine platzsparende Trockenbox mit einem durchdachtem Konzept. Ich hab viele Trockenboxen und aufbewahrungslösungen probiert, wobei alle irgendwo nachteile hatten, die mich gestört haben. Sei es unhandlichkeit, schlechte Raumausnutzung, mangelhafte Abdichtung etc etc, daher bin ich schlussendlich bei der Polydrier box gelandet. Bis jetzt kann ich wirklich nicht meckern, der Deckel hält richtig gut und Luftdicht, der Filamentauslass funktioniert wie ich mir das vorgestellt hab, die Rollen laufen akzeptabel leichtgängig (mit der zeit laufen sie leichter wie zuvor, keine Ahnung wieso und ob das ein allgemeines Phenomenon ist) und das Filament bleibt wirklich lange trocken. Seit ich die Boxen gekauft habe lager ich PEBA und PPA CF darin, ohne zwischendrin zu trocknen oder das silicagel zu wechseln, und die relative Luftfeuchtigkeit beträgt immer noch unter 10% (weniger kann das Display nicht anzeigen). Der einzige Mod hierbei war das zusätzliche Silica gel welches ich in allen meinen Filamenten habe, das ist mit einem gedruckten halter in dem Loch der Filamentspule um es länger trocken zu halten (auch für Filamente im AMS ganz praktisch). Alles in allem eine gute, wenn auch nicht günstige Aufbewahrungsbox. Andererseits kostet bspw. mein PPA CF Filament weit mehr als die Box welche es schützt, von dem her ist das schon Okay... Die Dryer Base habe ich jedoch nicht gekauft, die Trockentemperatur ist für meine higher end Filamente sowieso nicht genug und wird von einem richtigen Trockner übernommen, aber wie gesagt muss man glücklicherweise nicht oft nachtrocknen, also bin ich damit zufrieden.

Filamento al 10% di umidità dopo 20 giorni!!!!