I think the song is about a guy who lived together with a girl. Now she abandoned him. He is still adapting to the bachelor live. He doesn't cook nor takes care of himself. When he sees the abandoned milk bottle at his porch he is suddenly confronted with how things have changed and he starts to appreciate how things were before. At the same time he is struck with the solitude of how, to outsiders, everything about his life seems pretty much the same. All they see is an empty bottle and they don't understand what that stands for. He must cope with his loss on his own.
I think the song is about a guy who lived together with a girl. Now she abandoned him. He is still adapting to the bachelor live. He doesn't cook nor takes care of himself. When he sees the abandoned milk bottle at his porch he is suddenly confronted with how things have changed and he starts to appreciate how things were before. At the same time he is struck with the solitude of how, to outsiders, everything about his life seems pretty much the same. All they see is an empty bottle and they don't understand what that stands for. He must cope with his loss on his own.