A chest with multiple inventories, separated by tabs. More inventories can be added by simply feeding the container a normal chest, and you can differientiate the tabs by middle-clicking them with an item to assign an icon. It can also be upgraded to gain more capabilities. Chest title can also be changed by double clicking the text to edit it for better organization.
Upgrades
Shulker shell - Keep inventory on block break (Only available for Minecraft 1.19.* and below)
Netherite ingot - Block is fireproof and won't be destroyed when thrown in lava or fire (Only available for Minecraft 1.19.* and below)
