[1.12] damaging item after crafting

[hibobjr]

So my initial goal that I wanted to achieve was to be able to use an item 20 times in a crafting table before it goes away. My idea was to use something like a durability on tools. I've gotten to the point where I've set the Item to stay in the crafting table (like a bucket of milk in the cake recipe) using .setContainerItem() and I've set the damage(which I think is durability but maybe I'm wrong) using .setMaxDamage(). My problem is how do I decrease the damage value every time it gets crafted?

 

Code for the Item:

 

public class ItemCheerioBox extends ItemFood{

    public ItemCheerioBox(int amount, float saturation, boolean isWolfFood) {
        super(amount, saturation, isWolfFood);
        this.setMaxDamage(20);
        this.setMaxStackSize(1);
        this.setContainerItem(this);
    } 

}