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

The storage container is great. There are two ports for feed tubes, so you can pint right out of the container. The included hydrometer makes it easy to see moisture levels. There is a silica pocket within the hydrometer, that helps to maintain proper levels. At the bottom of this container, there two plugs, that can be removed, so the container can be placed on the dryer dock. I have later bought one more container, this time with dry dock. Dry dock does not work very well. It takes long time to dry the filament, and moisture levels never go below 30%. The container however holds moisture levels low, for long time, if loaded with dry filament.

Great value and performance. The dryer portion doubles as a desiccant-gel-bead dryer with a 3D-printed attachment. This dryer and storage box are a must-have when printing with ABS, ASA, and other hydroscopic filaments that require active drying and dry storage. The ability to print with this filament without opening the container after drying is a huge plus. I will be adding more storage boxes to my collection in the future for use with TPU.

I have been eyeing this product and the associated dryer for sometime since seeing it on Youtube and getting a new Bambu Labs A1 printer. The concept is great, but the price really makes it impractical. I guess if you have disposable income, this would make a great system to dry, store, and use your 3D printer filament, but if you're like me, you have a LOT of filament. I can't justify $30 for every filament I have that needs to be dried and stored dry. I picked up the dryer/case and an extra case when they were on sale. The product is well made and super easy to use. It works exactly as designed. There is no way to set the actual temperature and the filament does not rotate while being heated, but I don't think either of these really detract from its usefulness. I have used it to dry PETG filament and gotten excellent prints from it. If you can stomach the price, go for it. If you catch it on a sale or the price drops, get the heater and a container or two. I built some DIY Filament Dry Boxes out of 3D printed parts and some airtight plastic cereal containers for about $7 or $8 each (including parts, filament, etc) and they keep the filament at 10% humidity. I use the dryer and then transfer the rolls to the cheap dry boxes. (rinse and repeat) Just do a Youtube search for DIY filament dry box and there are some excellent videos detailing how to make them.

I like to leave a review when one is worthy, and spoiler alert, this will be glowing. 3D printing is loads of fun with unlimited creativity, but there is knowledge that is gained along the journey. One little tidbit is that filament needs to be dried if you live in a humid area...And some, in not as humid as you would think area. After looking at the design of several devices from Creality, Anycubic, Sunlu, Comgrow and Giantarm (Filament Bags) I finally settled on the Polymaker. As I own an Ender 3 S1 Pro, I'm currently only feeding one filament at a time, so a multi-strand dryer while cool, didn't really make sense to me. I also am limited on permanent space. This lead me to the reduction of choice to single spool. I chose the Polymaker because it allows me to store the dried filament separately from the drying system (Which is partially built-in). The ability to see the humidity level in the box was a big part of my choice and know that the desiccant changes colors so you know when to recharge it. Yup, the desiccant is reusable, not just an individual pouch. And if that wasn't enough, each case comes with a good PTFE lead pipe so you can draw directly out of the case. The case itself is sealed really tight. The seals on the feet (Where you set it on the heated air flow device) also seal very well and have a rubber non-slip base as well. They stack very well too. As for the performance, well it was way better than I expected. When I received the unit, I had some prefoamed LW-PWA that had been out in the open air for weeks. When I put it in the container and let it sit for a few hours, it showed to be at 54% humidity in the container (UP from the 49 when I loaded the filament). I ran it on the forced heated air base for 6 hours as instructed. It dropped down to 41% after the first run. I decided to run it again, just for the heck of it, and it came down to 36% after the second run. After leaving it overnight it was down to 29%, just using the desiccant. Total reduction from 54-29% in less than 24 hours (About 22 hours total). I was very happy with the 25% reduction in that short period of time. Each box can be used without pulling the roll out. There are two options: 1 you can use the ball bearing rollers that are setups in the case, and they are so well designed that in an empty case, the airiflow will turn them, OR you can use the included roll post that ankers very well in the side of the box. The PTFE tubing allows for either vertical or horizontal tapping of the filament. I have minie setup to feed from behind the printer, but may make some changes in the future. Regardless, I know that the system will support whatever setup I choose. The base unit is very easy to operate, has recommendations for the filament drying temps and times listed, and allows you to set it according to that, or you can just set it for constant untimed running if you really wanted to drive it down faster. The foot print is very small as compared to the others I looked at. The power source is a bit large, but designed to not take all the slots on your power strip if using one. It will take up 3 depending on how close together they are. Overall I very much love the design of this unit, along with the well thought out engineering. The whole system seems very sturdy and strong which encourages me on its longevity. The only change I made to the setup was the desiccant color. III already had 2lb of Blue silica gel which turns to pinkish red, so i used that vs the orange that turns green. This was done for two reasons. 1. the color of the box is Blue/Black/Clear and it just looked better. 2. having the silica gel turn Pink/Red just made more sense to me with Red meaning "Stop" in my mind. Thank you for bearing with me ini what is the longest review that i have written in a long time. Should you choose to purchase this system, and it is a system, it wont let you down. Print Happy Days, and everyone will love your prinits!!

A very well engineered product that feels solid, looks great and works great. I purchased just the storage container and filled the bottom with desiccant. The included length of poly guide tube is a nice touch, it slid perfectly over my printer’s guide tube. Now I leave a filament loaded in the printer all the time and it’s entirely enclosed.

I print mostly PLA, with very occasional Silk or Matte. (I have yet to need to print with PETG). With Silk and Matte, and especially PETG, requiring low humidity levels of 20 to 30 for perfect prints, I was looking for a way to not only dry those rolls, but then keep them dry for extended periods of time until I actually need to use them for a print job while ensuring the humidity levels remain low enough to simply take the roll out and print from my ams lite. (The box does allow to print direct from it without removing the roll, if that is your preference). This is where the Polydryer and Polydryer storage box are the perfect solutions for me. Not only does the dryer work extremely well to dry my filament rolls, but I am then able to keep them dry for months at a time versus being forced to dry for hours and immediately print. When not drying, the actual dryer has a very small footprint which is also a huge plus for me. If you don't print filaments susceptible to moisture often, this might be the perfect option for you too. 🙂👍

This dryer is disappointing. This is my third dryer. List of issues: * The displays can only be read "straight on". That means only visible with your eye level with the table the thing is sitting on. If you are standing near the unit, you cannot read the displays. Hunch down. * Inadequate drying. This only reaches about 55C on the highest setting. It took 18+ hrs to dry a new spool of PLA. There does not appear to be much air exchange if any, so the moisture has nowhere to go except into the desiccant. This really seems to rely on the desiccant to dry things. * Recharging the provided desiccant is hard/impossible. I had a hard enough time pouring it into the box. After drying a single roll, the desiccant turned black, indicating that it needed recharge. If you read the instructions, you are supposed to put "the desiccant" in the oven at 200F. Uh, are you supposed to empty the pellets out and dry them in the oven? And then manually refill the thing? Every time? Are you supposed to put the whole module in the oven? I think that anyone that puts the entire plastic module with the desiccant pellets and the temp display in THE OVEN is in for a surprise. And don't put the humidity display with its LR44 batteries in the microwave either! You might have a fire! This unclear part of the instructions is actually dangerous. Are we supposed to manually empty the pellets EVERY ROLL and dry them? Depending on the desiccant to do al the work is dumb, it needs air flow to discharge water expelled from the fillament. *The latches on the box top are REALLY HARD to work. I thought that my unit was broken at first. I can definitely see people having trouble with this. * Fiddly little door seals at the bottom. After drying, you are supposed to seal the bottom ports with these. * my fan is making noise already. I would not buy this again. 1) It does not really dry. Drying PETG takes 24 hrs. 2) It was expensive for a dryer 3) There is a huge process to regenerate the desiccant after drying a roll.

Loud clasp on the box, my apartment neighbors love it at 2AM! Left the heater to dry out a vacuum-sealed roll of PETG for almost three days. It won't go lower than 20% humidity. The silica gel isn't sufficient. I just opened my second unit to find not only does it rock on its feet, it's WORSE than the first unit. These pieces of garbage don't even sit flat. I refuse to repair an already overpriced item. I hate to say it, but I think you might want to look elsewhere. Really high hopes, but they just don't perform and clearly have a quality control issue. Can't read the screen from any direction but right on it—lame. Color scheme is awful. What was wrong with black and white? No, let's go with blue accents, red buttons, and ship out orange desiccant. Colored like a child's toy. Pathetic product. **UPDATE:** Ditched the silica and bought Wisesorb 3A Molecular Sieve, and it's completely changed the game. If these hygrometers included could display a humidity lower than 10%, they'd be displaying lower than 10%. You've got to seal the box right after it's done "drying" and wait on the box to cool down. Then the built-in hygrometer will drop, and fast, unlike when using silica gel. Initially, I really wanted the color-indicating aspect of the gel. Then I got to thinking, why do I need a visual indicator my desiccant needs to be recharged if my hygrometer is permanently at 10% (probably lower) due to the molecular sieve? The answer is: I don't. The sieve can be recharged like other desiccants, but it should be a much, much longer time until it needs recharging vs. the silica gel. A molecular sieve works better than both silica gel and activated alumina across a wide range of temperatures. It's far more effective than silica gel, especially at lower humidity levels, where molecular sieves can reduce moisture to extremely low levels (below 10% relative humidity). As for activated alumina, it's more effective at higher temperatures, typically working best above 100°C. Silica gel performs well up to around 70-80°C but begins to lose effectiveness at higher temperatures. In comparison, molecular sieves remain highly effective even at elevated temperatures up to 300°C, making them suitable for drying filaments in a heated environment or at low room temperatures. I'll be designing multiple desiccant holders for the Polymaker box and will attempt to link them here. The desiccant holder that comes with the PolyDryer Box leaves a lot to be desired. The holes on the stock desiccant holder are a little too big for the Wisesorb Molecular Sieve. The desiccant can fit into the vent holes and completely block the opening. The desiccant won't fall through the vent holes, but it does block the holes. Simply fill the stock desiccant holder 70% full to allow the top holes to breathe and you'll be good. That said, simply dumping the molecular sieve into the bottom of the unit brought my 46% humidity to 10% in less than 4 hours, NO DRYING AT ALL. Another +1 for the box and another -1 for the "drying" unit. --Sidenote-- Polymaker says not to dump loose desiccant into the bottom of the box. I second that, don't do it, lol. Wait until someone makes a desiccant holder for the bottom or back side. I've been continuing to use the dryer unit, and it continues to not sit flat. I won't buy another dryer unit from Amazon. The second dryer they sent me was 4 serial numbers from the first they sent, and it has the same defect. The PolyDryer Box however, is a perfectly fine product. It's possible to put enough pressure on the top when opening so that the clasp isn't wake-you-from-sleep loud. I'd rather the clasp be sturdy and harder to open than easy to open with a sub-par seal.