This is another desiccant holder for the Bambulab AMS system, I designed one to fit the hygrometer that I'd bought to fit in another model, but it didn't fit. I made a whole set just so they'd match.
This is the hygrometer I've tried and tested:
https://www.amazon.co.uk/dp/B07JDSHD4Z?psc=1&ref=ppx_yo2ov_dt_b_product_details
This is the model in OnShape in case you have a different hygrometer:
The v3 Small Container makes the lid rail slightly larger and adds a cross bar like the large containers.