Glass bottles cost a lot to transport, occupy a lot of space, must be washed and sterilised. PET bottles are crushed in the machine that you return them to so

Glass bottles cost a lot to transport, occupy a lot of space, must be washed and sterilised. PET bottles are crushed in the machine that you return them to so they occupy less space and are much lighter. Here in Norway where most drinks containers have a deposit we have almost completely switched to PET bottles and aluminium cans for beer and soft drinks on the grounds that recycling PET bottles and aluminium cans is cheaper than reusing glass ones.