How to Store Filament Without a Dry Box (Cheap Alternatives)

Dry boxes are great—but they're not the only option. If you're not ready to spend $30–50 on a dedicated filament storage box, these cheap alternatives work surprisingly well.

1. Ziplock bags + desiccant The simplest solution.

  • Keep the original filament bag after opening
  • Squeeze out air and seal tightly
  • Add fresh desiccant (rechargeable silica gel packs)
  • Write the opening date on the bag Cost: $0 if you keep the original bag. This is what every maker should do as a baseline.

2. Plastic storage tub A $5–10 airtight food storage container works as a mini dry box.

  • Get one that fits your spools standing up
  • Add rechargeable desiccant packs
  • Throw in a cheap hygrometer to track humidity
  • Seal the lid between prints Works as well as a $30 filament dry box for one or two spools.

3. Vacuum bags Food vacuum sealer bags (the kind for sous vide) work great.

  • Place spool in bag, add desiccant
  • Vacuum seal
  • When you need to print, open a corner, feed filament through, re-seal
  • More reliable than zip bags for long-term storage

4. Rechargeable desiccant The key ingredient. Buy a pack of rechargeable silica gel canisters ($10–15 for a set). Recharge in the oven at 120 °C for 4 hours when they change color.

  • Better than single-use packets
  • Lasts for years
  • Works in any container

5. In-printer dry box If you print with a spool on the printer, put a small desiccant pack next to the spool. Even an open-top box around the spool reduces moisture absorption during printing.

What doesn't work

  • Just leaving the spool on the printer
  • Storing in a garage or basement (high humidity)
  • Using cat litter as desiccant (it doesn't work for filament)

The goal is simple: keep filament below 40% RH when not printing. You don't need fancy equipment—just airtight storage and desiccant.

Every Arkforge PLA spool arrives vacuum-sealed with fresh desiccant, so your storage starts strong. Just keep it that way between prints.

Store smart. Shop Arkforge PLA.

Happy printing!

– Arkforge Team

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