What's a good cd case holder/binder if your worried about scratching your dvd movies or computer software?

If I am on the move I tend to use one of my many empty cake box packs I did have a carrying case with a zip fastener but I found that the zippers broke after a few weeks regardless of the price I think the best one came from Wilkinson's discount store but that broke after a while but it was very cheap my computer engineer mate has a very pricey hard case [ bit like a briefcase ] cos he has hundreds of discs to carry about but his firm supply that and it is a bit big for occasional use