Put the unopened container of ricotta cheese into a freezer bag just in case the container seal breaks while in the freezer.
Remove as much air as you can from the bag and then seal it.
Straw "vacuum seal" trick (optional): Slide a straw into the bag and suck out the air so the bag "shrinks" around the ricotta container. Slide the bag down the straw as you inhale, and quickly seal the bag while you remove the straw.
Write today’s date on a freezer label, stick the label to the bag, and put it in the freezer.