WHAT IS ART?

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UPCYCLING TETRA-PACS

I have chosen to invest a good deal of my time to up-cycle the tetra-pacs we use in our household.  I learned this beautiful weave from a tutorial on YouTube, which has helped me to make all shapes and forms of boxes, bags, storage units.  They are utilitarian, and in my eyes, quite pleasing too.  Is this art, or is it not art?  
For me the creation of these tetra-pac boxes is a transformation of a waste material to a useful product.  I enjoy the process of making them.  There is some creativity involved, although it is more a matter of design and calculation.  I would consider these woven baskets works of craft ~ leaning towards art.  The art being the spirit of transformation, and limiting my wasteful disposal.  What do you think?