The Collaborative International Dictionary of English v.0.48:

shrink-pack \shrink"-pack\, shrinkpack \shrink"pack\, n.
   same as shrink-wrap, n..
   [PJC] shrink-wrap

The Collaborative International Dictionary of English v.0.48:

shrink-wrap \shrink"-wrap\, shrinkwrap \shrink"wrap\, n.
   a type of plastic film, usually transparent, that shrinks
   upon application of heat, and may be used to form a wrapping
   around objects that fits tightly and closely follows the
   contours of the wrapped object; -- also called shrink-pack,
   shrinkpack or shrink-wrapping.
   [PJC]