Viupax™ has unique features that no other shoe box in the market has.
More Sustainable/occupies less volume
fast size/model/color identification system
makes product stand out
FAST shoe size last check on cashier
Can be converted to a stand
Can be converted to a hand carry bag
Can be transformed into a toy (no tools required)
Whether or not you can observe a thing depends upon the theory you use. It is the theory which decides what can be observed.