Not the old one. I'm thinking of an item like forestry backpacks, that can only hold void tears. It would let you cycle through the void tears it contains with shift + left click, so they take up less space in your inventory.

So you could hold, for example, a dirt, a cobblestone, an iron ore, redstone, lapis, etc. You could have a bunch of tears (I was thinking 9?) in a single satchel, and it would only take up a single slot on your quickbar.

Since the methods for tear interaction are already fairly solid, it would just be a matter of extending the tear's NBT methods up a layer, and allowing the satchel to contain those NBT tag compounds in a tag list. My gut says this would be very easy to do, although doing it with a GUI would add an (in my opinion) unnecessary layer of complexity to the feature.

Comments?

Had an idea. If it was like.. a crystal cluster, maybe 6 crystals max? And the crystal representing the void tear you were currently selected glowed with an overlay that cycles when you switch between crystals in the list.