This desiccant aka silica gel drier is designed to be used inside your Bambu X1C or alternatively, a Sunlu or similar filament drier.
The accompanying funnel has a slight oval shape to facilitate pouring the dried desiccant into a storage container or back into your AMS filament drying containers.
The hygrometer allows you to monitor the drying process to ensure that you have sufficiently dried your filament. After going through a heating cycle, wait until the container has cooled to room temperature before reading the humidity level of the container. It may take more than one cycle to sufficiently dry the gel.
The hygrometer is purchased from Niceco from Amazon: https://www.amazon.ca/gp/product/B07TKHCB5N/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1
Note: Not all desiccants are not made to be recycled through being dried.