To fully upgrade your inventory you will need to spend a huge amount of money, so why waste them when you can find a place where you can upgrade them for much cheaper. Your inventory is an essential utility that you will need for future gameplay progress to hold more items and don’t throw different things on the ground.
This guide will show you how to upgrade your Inventory in Tiny Tina’s Wonderlands.
Tiny Tina Wonderland’s: How To Upgrade Your Inventory
On the Map you should find the Blacksmith’s Forge.
Once you have arrived there on you should turn left from the Blacksmith.
Close to the wall and next to a chest, you will be able to find a huge coffin that you can interact with.
So there you go, you can open it and upgrade your weapon and your whole inventory.