Summary

Cap for maple sugar tap.
https://youtu.be/St__znx4grE

I purchased this spile:
https://www.amazon.com/gp/product/B01B8I3XA6/ref=ppx_yo_dt_b_asin_title_o00_s00

If you need to customize this to fit a different type of spile, the original design can be accessed on Tinkercad here:
https://www.tinkercad.com/things/bDZaf5nn8MX-maple-tap-cap/