Conceptualizing waste prompt

Choose an object in your everyday life that is typically considered to be waste.  (Include a photo of it in your post.)  In what ways does Mary Douglas‘ conception of dirt help us to understand why this object is waste?  Are there other conceptions of waste (using Sarah Moore‘s examples) that are more useful in explaining why we understand this object to be waste?  (And/or, do any of these conceptions seem to not work for your waste object?)