This item allows the player to store or discard unwanted/excess items. This is very useful on long mining sessions, where the player accumulates a lot of cobblestone/gravel/dirt, which would fill up the inventory if the /dank/null item wasn't used.
This is an improved version of the "/dev/null" item from OpenBlocks. Unlike /dev/null, /dank/null has 4 different tiers, and each tier has multiple slots and can hold more items than /dev/null, and the storage capabilities increase with each tier. It also adds a docking station for easier disposal of items.
It's available on 1.12 and 1.11, and has a total of 4,769,973 downloads.