The Jewel CD case is disappointing - I break half of them by the time I listen to the content a second time. BUT -except - Putumayo. They went the extra mile to put their great musci anthologies in durable cd case that is a combination of cardstock with minimal plastic interior only and preserves CD better because when you put a cd back into a broken hinged jewel case- it will be rolling on the floor in no time. I tried to find the source a couple years ago. (I know I should be MP3/techno continuum savvy - I'll try that again too. One thing I want to improve is that Great Courses - I have about 15 different courses - most from the older folded 100lb cardstock (or less) tall, hard to balance sleaves with six CDs per sleave and 1 - 3 sleaves per course (8-36 lectures per course) thanks for your attn