Advanced Shulkerboxes lets you open them while they are in your inventory. Just right-click while holding the box and you can add or remove any items you want!
You can also place the box anywhere and still access the same items.
This mod essentially doubles your inventory capacity or multiplies it immensely if you carry multiple boxes. And after you’ve place the box, you can pick it back up with all items intact by breaking it with a pickaxe and placing it back in your inventory!DownloadForumInstall Guide