Polymaker 3D Printing Filament Storage Box - PolyDryer Box for Continuous Filament Sealing and Protection, 3D Printer Filament Holder Compatible with PA Nylon, PLA, PVB, PETG, ABS, TPU 1.75mm 2.85mm

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.

I took a gamble on these after seeing some not-so-positive reviews. They are fairly expensive but evidently they've already lowered the price considerably. These are modeled after a commonly used design pattern in the 3D printing community using cereal containers. You could certainly "build your own". I think what you're buying here is convenience and the capability to use the modular drying system.After running the dryer on the "recommended" stock setting for PLA (level 6 for 6 hours) it lowered the humidity from 48% to 31%.Honestly I'm very satisfied with the purchase and like them a lot. They're easy to build and made of thick materials. I won't be using the capability to print directly from the containers since I have an AMS system, but there's an included tube to make that happen.I use Bambu filament, and they fit when not using the blue "roll holder/tube" thing. I just store that diagonally at the bottom of the container.