OOP JavaScript: Adding or removing objects via built in functions.

gistfile1.txt

var fridge = { 
    addItem: function(name, type, expirationDate, healthRating) {
        this[name] = {type: type, expirationDate: expirationDate, healthRating: healthRating};
     },
    removeItem: function(name){
        var recentlyRemoved = delete this[name];
    }
};
fridge.addItem("bannana", "fruit", "2 weeks", "100");
fridge.addItem("steak", "meat", "1 weeks", "70");
console.log(fridge);
fridge.removeItem("bannana");
console.log(fridge);