The food scale may be assembled in a 3D printed case, with 3D printed stand-offs for the strain gauge, described below. The top of the case benefits from some supports.
The STL files can be downloaded directly here or from Thingiverse.
There are four stand-offs to use with the strain gauge and M4 screws so that the strain gauge can be mounted to both the top and bottom of the case.
The top and bottom of the case has mounting holes for the strain gauge and cutouts for your container's standoffs.