Airtight Filament Box

Since boxes like eSUN filament box cost nearly a 100 bucks, just to keep your single (!) filament roll dry and tempered, I designed my own. You'll need these addons to make it work:

- A hygrometer / thermometer ( I used this one: https://www.ebay.de/itm/264347580514 )
- A heat mat ( i.e. https://www.ebay.de/itm/Heizmatte-wahlweise-5W-7W-14W-20W-28W-35W-45W-Heizmatten-Terrarium-Heizung/163701295512?var=463192412926 )
- Some rubber glue or rubber bands for the lid's cutout rim
- Alternativel