PGF has a nice feature, declaring an image and re-using it again and again. With a PDF backend, it reduces the size of the output, as the image is embedded in the file only once. However, the PGF manual clearly states that LaTeX users should prefer
\includegraphics to this mechanism.
Is it possible to mimic this feature, i.e., reusing an image without increasing the file size, using LaTeX's native graphics packages? Would putting the image in a box do this effect?