There are two kinds of roaster bags, the ones that go around an item and don't touch the sides of the roaster and the ones that fit in and line the roaster and do touch the sides, which are stronger and more heat resistant.
However, I don't use them for this.
I bring the water to a boil in the cooking pan of the roaster, stir the rice and seasonings in, cover and turn to 325. When done, I turn to 180 to keep warm. See the baked rice pilaf recipe for discussion of timing and heats.
A very large cardboard box or non-meltable laundry basket is a good way to transport the hot rice in the roaster.
