Thats what I use for them. I cut a piece of mesh to fit over the top to keep fruit flies in and then set the screen lid over that. I glue the mesh down all around the edge except on one corner. Leave them all in there until they're about L3 and then you will be at a number that you can seperate them.
It should be fine, but I've oticed that ff tend to not move after a while, so some nymphs may not have a chance of food. Up to you. You could make sure that each one gets at least one to eat, but....that's a lot.