This article is from the Toys FAQ, by email@example.com (Scott Gordon) with numerous contributions by others.
To date there have been three versions of Iceman in the Toy Biz X-
Iceman Ia - A clear figure which had color-changing icicle
formation feature when placed in the freezer. Released in
limited supply because of its tendency to break once frozen.
Iceman Ib - Same mold as Iceman I, but made of almost transparent
blue plastic. Had none of the features of Iceman I.
Iceman II - A new mold and easily distinguishable from Iceman I.