Which innovative packaging design approach helped fuel the viral 'unboxing' trend that became a pop culture phenomenon on social media platforms?

The intersection of packaging design and pop culture has created some of the most memorable product experiences. Iconic packaging can become as recognizable as the product itself, sometimes achieving cult status. This trivia question explores how innovative packaging design has influenced a major pop culture trend in recent years, creating a unique customer experience that helped propel a product to viral status.

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Russian nesting doll-style packaging where multiple layers reveal different products or messages
Biodegradable packaging that dissolves in water to reveal the product
Augmented reality packaging that activates special digital content when scanned
Packaging that changes color based on the temperature of the room