Backpack (Project Red)

The Backpack is an item added by Project Red. If the pack is used, a second inventory is opened, which can store items. If the backpack is destroyed by an explosion or by lava, all the containing items will dissapear along with it.

If the mod MineChem is installed, then you can decompose all Backpacks with the Chemical Decomposer into specific chemical compounds of MineChem.