Hey There. If you want to keep your filaments dry this model is a silica gel tray designed especifically for an especific cereal container (see uploaded photos). the container brand is Chef's Path and you can easily find it on Amazon or any other online store. It can hold up to 1Kg spool filament inside. No special requeriments, it fits nicely inside the container. Note: Also this model should be used with the filament spool holder that I'm gonna upload. this spool holder is not my design. It's a modified one to fit on the conntainer and tray