Bundle

The bundle is a storage item that can be used for managing items inside the player's inventory.

Usage
Bundles are used to store different items in the same inventory slot. Bundles can only hold the equivalent of one inventory slot worth of items, for a total of 64 bundle slots; items that stack to 64 take up one bundle slot, items that stack to 16 take up four, and items that do not stack take up the whole bundle. Bundles themselves can be held in bundles, which is intended, taking up 4 bundle slots + their contents in bundle slots.

Although bundles cannot be stacked, each bundle uses only 4 slots, with the addition of items stored inside. That is, each bundle can put up to 16 empty bundles.

Bundles cannot be directly opened and have no UI; items can only be moved in and out of a bundle inside of the existing inventory by right-clicking the items into the bundle. To retrieve the items from inside a bundle, the bundle must be either held and or right-clicked inside the inventory.