What are the best product cases?

I have noticed that there are quite a few companies on here that have their products in some awesome cases. I just seen the nipple clamps from Metal worx that has a really cool little lock box type case, and of course my wife loves the luxotiq products casing. I was wondering-what is your favorite company or product cases? She likes to re-purpose them, so I was wondering what else we can look at getting that might have a reusable cool case like the metal works magnetic nipple clamps. It almost looks like a mini lockable sex toy case lol!