A replacement cup for those inline compressed air dryers. This one is 100mm tall however compared to the original at 60mm. No semi-auto drain line. Ill do another one sometime with a 1/4"BSP threaded hole to attach a release valve or something.
Example inline air dryer here:https://www.amazon.com/dp/B07Z5P82WC?psc=1&ref=ppx_yo2_dt_b_product_details