Slice the hot pot roast so that it cools down faster. You can also cool the meat quickly by placing it in the refrigerator for one hour before packaging it for freezer storage.
Place the pot roast slices in a rigid, freezer-safe plastic storage container and pour the roast's cooking liquid or gravy over the meat slices to prevent them from drying out during the freezing process. Allow a 1/2-inch head space for expansion.
Wipe any liquid or gravy off of the rim of the container with a paper towel before pressing an airtight lid onto the container firmly.
Create a label for the container by writing the storage date onto a piece of freezer tape. Press the label onto the container as a handy reference.
Store the pot roast in a freezer set at 0 degrees Fahrenheit for two to four months.