For quicker weeknight meals, packages of pre-portioned cooked grains stashed in the freezer are one of our secret weapons. No waiting for rice or other grains to cook while your dinner companions prowl hungrily around the kitchen. No need to plan ahead. No need to do much more than pull a package out of the freezer and carry on with making the meal.
The article says the vacuum sealer is optional, but seems like it’d be the weapon of choice. A sealable plastic bag will take up less space in the freezer, and most importantly, it will thaw much more evenly later on. You won’t be left with frozen grains in the middle of your rice clump while the outside is ready to eat. You can also write the quantity and day it was cooked right on the bag.