IRIS USA 46.6 Quart WEATHERPRO Plastic Storage Box with Durable Lid and Seal and Secure Latching Buckles, Weathertight, Clear with Black Buckles, 2 Pack
Pricey, but worth it, and available in multiple sizes. Gasketed lid with 4 latches, great for sealing up filament for storage. This is what my filament lives in when not being used.
Eva-dry E-333 Renewable dehumidifier, Pack of 1, White Sand
rechargeable silica pack. turns green when no longer effectively pulling in moisture. Simply plug in for a day and it dries back out. great for inside totes.
AMOLEN 3D Printer Filament Storage Bag Vacuum with Two Sizes - 45 PCS Spool Storage Sealing 12 Bags Dust Proof Humidity Resistant for Keeping Filament Dry
I have these, they aren't too bad. the hand pump is cheap and doesn't work well, but a small vacuum sure does! has a built in moisture gauge on it, but I like to throw in a cheap humidity gauge along with some Silica Beads.
[2023 Newest Upgraded] SUNLU Official 3D Printer Filament Dryer S2, Filament Storage Dehydrator for 3D Printing, 360° Surround Heating, Dryer Box S2 for PLA Nylon PA ABS PETG 1.75 2.85 3.00mm, Black
Can be used as a standalone drier, or as a filament roller device. I modified mine with a compression fitting and a bowden tube to guide the filament to the extruder. I have this and its a must have item.