Spoils Bag

The Spoils Bag is a bag obtained early on in The Wind Waker.

Location
The Bag is found inside Tetra's Ship. To get it, Link must beat Niko's rope-swinging "challenge".

Uses
The item is one of the game's three unique bags capable of storing other items, saving space in the main Inventory. This bag in particular holds items dropped by enemies.

It is essential to progress through the game, as Link needs to collect 20 Joy Pendants to give to Mrs. Marie for the Cabana Deed. The deed is required to access one Triforce Chart, therefore making the Spoils Bag a mandatory Quest Item.

The items that Link puts in his bag are as follows:
 * Blue Chu Jelly from Blue ChuChu
 * Red Chu Jelly from Red ChuChu
 * Green Chu Jelly from Green ChuChu
 * Boko Baba Seeds from Boko Babas
 * Joy Pendants from Bokoblins (and numerous Treasure Chests)
 * Skull Necklaces from Moblins
 * Knight's Crests from Darknuts (and the occasional Treasure Chest)
 * Golden Feathers from Peahats, Winged Mothulas, and Kargaroks

Trivia

 * The face on the Spoils Bag is highly similar to the face of Bogmire, a boss from Luigi's Mansion.