The Big Bag is an item in EarthBound Beginnings. It is received from an inhabitant of Magicant, who resides in the most southwesterly placed building of the town area. He asks Ninten if he would like to have the item, while afterwards asking if he could borrow Ninten's Cash Card. If answering yes, he will then take the card, and must be spoken to again to have the card returned, along the Big Bag, which he gives away as a gift.
The bag contains a total of 30 Magic Herbs, which roughly equals to 900 HP that can be recovered through the use of the bag. After all of the herbs have been used, the bag will vanish into thin air