Parametrizable openSCAD model for a NUK Magic Cup. The bottom plate will be inserted from top into the base cup holder. Align the lugs with the slits.
The bottom plate is conical. The bottom plate may be glued into the base cup holder.

Print the base cup holder upside down without support.
Print the bottom plate without support.

The width of the bed edge can be adjusted with W_2=26; // width bed edge.
The diameter of a cup can be adjusted by D_inner=67.0; // nuk magic cup diameter @ H_holder - H_5.

For creating the STL files from openSCAD, set one of the build flags to 1:

// build flags
make_base_cup_holder=0; // set to 1 for creating STL of base cup holder, else to 0
make_bottom_plate=1; // set to 1 for creating STL of bottom plate, else to 0