Bottles

He didn't know why he was doing it, but he knew that he had to do it.
He had taken the empty milk bottles from outside every house on his street and stacked them in a precarious-looking pyramid shape outside the shop.
It wasn't enough. He needed to get more.
He collected the bottles from the streets either side of his.
There were now almost 200 bottles in his structure.
His job was done.
He weaved home with his recently-acquired traffic cone.