I used Scotch Bumpers for grip. You can use any feet that's <13mm.
STL file without feet holes is slightly taller.
Features:
Concaved the inside to make it easier to clean.
Size and corner radius matches the hopper cover.
13mm holes for rubber feet.
Slicer:
10% Infill
3 Walls
No Supports
The author marked this model as their own original creation.