The way to be popular by just holding a shopping bag

Not sure if I want to have the last one.  

Those bags are all saying like 

"If you want to grab attentions on the street, just buy our products!" 

When I was at school, I used to buy brands that offer nice shopping bags.

I might have wanted to show off that I have bought products from there.

I think shopping bags themselves can be very powerful adverts to show your identities.