Which music industry packaging innovation was introduced in 2001, sparked controversy among collectors, and eventually became the standard format despite initial resistance?

Pop culture and product packaging have always had a fascinating relationship. Some iconic packaging designs become cultural touchstones, instantly recognizable across generations. This poll tests your knowledge about a significant packaging innovation that created major buzz in the entertainment industry and changed how consumers interacted with a beloved product. Think you know your pop culture packaging history? Let's find out!

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The digipak CD case (cardboard packaging replacing plastic jewel cases)
The CD-ROM enhanced album (regular audio CDs with bonus computer content)
The slim-line DVD case (reducing standard DVD packaging thickness by 50%)
The clamshell-free CD packaging (eliminating hard-to-open plastic security wrapping)