This thing goes very well with the Turin DF64 G-Iota, whatever, flat burr single dose coffee grinder, for easier coffee refill. To replace the metal cap one that comes with the grinder, which is a bit heavy, and fiddly when removing to refill coffee in.
Also check this Lagom style lid cap, however, the lid can be used without the cap:
https://www.thingiverse.com/thing:4893140
DF64_Lagom_style_lid_for_bellow.stl | 258.4KB |