This can be done by finding certain Deku Business Scrubs who will upgrade your Deku Seed Bullet Bag pouch allowing you to carry more Deku Seeds for your Slingshot, as well as upgrading your ability to carry more Deku Nuts and Deku Sticks.
Additionally you can find upgrades to your Bomb Bag to allow you to carry more Bombs and to your Quiver to allow you to carry more Arrows.
These videos will show you how:
Table of Contents
Bigger Deku Seed Bullet Bag (40 Bullets)
Biggest Deku Seed Bullet Bag (50 Bullets)
Carry More Deku Nuts (30)
Carry Many Deku Nuts (40)
You will NOT be able to collect the Deku Nut’s highest upgrade if you don’t get it (at the Forest Stage) BEFORE you collect the Poacher’s Saw item. To avoid this, go to get the Deku Nut upgrade as soon as possible while you are young and as soon as you have access to the Masks required to get it.
This video reveals why you can’t get the Deku Nuts past a certain point in the game (getting the Poacher’s Saw, it turns out).
Carry Many Deku Sticks (20)
Carry More Deku Sticks (30)
Big Bomb Bag (30) – Found in the Bombchu Bowling Alley at the market as Young Link. Wait until the item given as an award is the Big Bomb Bag, then wi the minigame.
Biggest Bomb Bag (40)
Big Quiver (40 Arrows) – Simply beat the Kakariko Village Shooting Gallery as Adult Link using the Bow and Arrow to beat the mini-game.
Giant Quiver (50 Arrows!) – Earn over 1500 points in the Horseback Archery Range to get this biggest Quiver!