I made this in blender, drag the up and down to control the shape keys. This is a really simple model, pretty low poly, easy to work with.
STL (Stereolithography, filesize: 350 KB), OBJ (OBJ, filesize: 454 KB), BLEND (Blender, filesize: 1.26 MB), DAE (Collada, filesize: 481 KB)