Reusing is the best form of using your waste because there is no energy involved. When you recycle you need energy for the truck, for the factories to process the waste, and energy for the vehicles who export the waste. When you throw waste away you need energy for the garbage trucks, you need energy for incineration or landfill, and you need energy for everything that tests the landfill from leaking of leachate to methane concentration levels. When you reuse it goes from one place in your house to another place in your house without any high energy transfer. You just maybe need to rinse it and then you are good to use it in the way you want to.