OVV3D Filament Storage Bags 30pcs, Plus Size 32X34cm 3D Printer Filament Storage Bags Vacuum Sealed Kit with 30 Desiccants, Auto Pump,Perfect for 3D Filament Storage or Using After Filament Dryer Box

This is my absolute favorite brand of bags, as they work consistently, they last for tons of uses before the seal wears out. This vacuum is superior to all of the other types and brands that I've used. I will not buy any other brand of bags for my filament.

There are numerous glowing reviews here, so perhaps I got a "bad batch", but these bags have been useless for me. The vacuum pulls very, very slowly, but I didn't expect a small hand vacuum to be all that powerful so that's not my complaint. I was able to use it on a few bags, but what I ran into is the vacuum not being strong enough to pull air out of the bags at all. Thinking it was the weak pump, I purchased a small hand-vacuum and that didn't pull air out either. This morning, I finally did a bigger test and tried to pull air out of 15 of the bags (new out of the box and therefore previously unused, with a spool of filament in them) with the hose attachment on a full-size floor vacuum cleaner and it didn't do anything on ANY of them, which tells me these valves are not working at all. It does seem odd to me that the first few bags I used worked okay (and have maintained great seals), but that other bags later have been failures. They have been stored at room temperature in a dry environment.

I started out loving these bags and pump. They sealed well and never leaked. However, a few months in and maybe a couple dozen uses, the pump barely suctions. I’m guessing an internal seal broke or something because the motor still sounds like it’s pumping.

I've used a few different dry-box storage options, and this one has worked the best for me for longer term storage. I've used about 10 or more bags already and only one hasn't held a vacuum very well. All of the others have stayed very tight for several weeks and appear that they will last for a long time. The bags are a bit tight getting the spools of filament in them. Don't expect to get a large spool in them, but the average size ones do fit. The vacuum pump works very well and will bend the filament spool sides in on partial rolls if you let it. It pulls a much higher vacuum than any of the other pumps I've used before and it gets a great seal on the bag when pumping. The only thing I have to do is remember to raise the bag a bit on a flat object where the pump seals so it will stay flat when getting pulled in tight. I'll definitely be buying this again if I ever need more bags. But since they are reusable, it may be a while before I need more.

Bags work great so far. I just wish that I had read the full specs closer because the pump is micro-usb. In 2026, these things should all be type c. Shame on me for not checking, but still....