Thank you for viewing! This is a case to protect 3D printer filament from moisture, made using a sealed container from Inomata Chemical's dried food stocker 6.0. A silica gel packet, originally included with the Inomata Chemical dried food stocker, is also included, so you can use it right away (with instructions). This is an arrangement that makes it even easier to use, mainly based on Mugicha-san's spool. It's less than half the price of the original (6500 yen → 2800 yen). [Reference Video/Mugicha-san's Page] https://www.youtube.com/watch?v=NSq9b6FQUHs [Spool Section] https://mugimugi159.booth.pm/items/5581594 [Fitting Section] https://www.thingiverse.com/thing:3058740