Only part of the object is being scaled I'm trying to shrink a specific section of my design, which originally, I made like this:



When I use the shrink tool, I get this:



But from what I can tell when I open CURA, it's almost like I'm shrinking the inside and not the entire stem of the object? It looks like there's still an outside layer of the stem that isn't being shrunk, and I'm not sure what I'm doing wrong.
As pointed out int he comments above, you don't have the entire stem of the glass selected. To select it all, press Z to enable wireframe view. This will let you select through the mesh as well, not just what you can see. Then use the box select tool with B to select everything you want. Change back to solid view again with Z and the scaling will work as you expected.