Ender Tab Potions permanently expand your Ender Chest storage by unlocking extra tabs. Each tab gives you another double-sized Ender Chest, letting you store far more items. Your rank determines how many tabs you can unlock in total: Default starts with 2 tabs and can reach 3, Gold up to 4, Emerald up to 5, Diamond up to 6, and Netherite up to 9. Higher ranks increase your maximum limit, but you must still drink Ender Tab Potions to unlock the extra tabs.