Orange juice can be made into frozen concentrate to increase its shelf life and facilitate shipping. Turning juice into concentrate involves extracting the water from fresh orange juice, leaving just orange concentrate. You can make concentrate at home or buy it in the frozen foods section at the grocery store. Before you can consume either type of concentrate, you will need to add water to it to make it drinkable.
Thaw the frozen concentrate in the sink for 10 or 15 minutes so that it will come out of its can easier. Remove one metal end of the can and dump the concentrate into a pitcher. If the concentrate refuses to come out of the can, run the sides of the can under hot water until it's sufficiently loosened.
Add water according to the directions on the can. If the can does not have directions, or if you made the concentrate yourself, mix three parts of water to one part of concentrate.
Mix the water and concentrate with a large mixing spoon. Cut the concentrate chunk into pieces with the edge of the spoon to make it dissolve faster. Stir until the mixture is liquid and the concentrate has fully dissolved.