The box now has become exceptionally exquisite, like a work of art.
Furthermore, the description has changed; before, it could only extend the shelf life of food.
But now, it can extend the shelf life of any item.
Moreover, directly adding a hundred years!
This timeframe is indeed quite significant.
Not only that, just like with the pistol before, upon surpassing level ten, the wooden box turned into a Marvel.
A plain wooden box transformed into a Marvel, capable of extending the shelf life of any item by a hundred years.
This kind of item definitely counts as a treasure.
However, Yang Yuan was frustrated because it did not achieve the effect he desired.
'Let's give it a try first.'
Yang Yuan walked out of the Safe House to retrieve the level ten cooler from the supply drop box and placed it inside the Marvel preservation box, closing the lid.
Unfortunately, the cooling effect still radiated outside and wasn't isolated.
'As expected, it doesn't work.'
