Case in point: The Uniqlo shoulder bag, a $20 semi-circle pouch that has taken the world by storm for its seemingly black hole-like ... While Porter's large Tanker Sling Bag costs around $625 ...

Since the success of the Uniqlo bag, many other brands have jumped on the trend, creating their own similar items. Next offers its £18 Sling Cross-Body Bag which comes in seven shades, and they've ...