The subject matter disclosed and claimed herein, in one aspect thereof, is a portable, insulated animal drinking container that reduces the likelihood that the container contents will freeze, and that does not require an external heating or power source. In a preferred embodiment of the present invention, the portable, insulated drinking container comprises an outer container, an inner container, an insulating material positioned between said outer container and said inner container and a cover with a continuous opening therein to enable the animal to access the contents on the inner container without disturbing the insulating material. The insulating materials may be comprised of organic or inorganic insulating materials, or a combination thereof.