Bombchu Bag

The Bombchu Bag is an item from Phantom Hourglass. In order to carry or buy Bombchus, Link must obtain the first Bombchu Bag from inside the Goron Temple, which will let him carry 10 Bombchus. This trait is unique to the game because, in both Ocarina of Time and Majora's Mask (the first games where Bombchus appeared), the Bomb Bag was enough to support bombs of any type.

Bombchu Bag Locations
As mentioned before, the first Bag is kept at Goron Island as its dungeon item. Afterwards, the Goron Island Store will put a Bombchu Bag upgrade up for sale for just 1000 Rupees, increasing the Bombchu-carrying capacity to 20. The largest Bombchu Bag, which allows for a maximum of 30 Bombchus, can be won by completing the minigame at Dee Ess Island in 35 seconds or less.