[jyl]

Put the turkey in a cooler with salted water and ice.

That's how you'd have to brine it anyway, if you don't have a brining container that can go in the fridge. If you do have such a container, then just move the bird and brine into that and then into the fridge.

I wouldnt use the vegetable box to brine the bird in the fridge, because it doesnt have a tight lid (cross contamination) and if it is the kind that slides on rails, the rails will break off under the weight.

Don't worry about saving the old brine, salt is cheap and so are peppercorns or whatever else you use.