Deduplicate coffees code

dedupCoffee.js

var beverage = {
    "SB"  : "Short black",
    "LB"  : "Long black",
    "Cap" : "Cappuccino",
    "FW"  : "Flat white"
};

var milk = {
    "reg"  : "Regular",
    "soy"  : "Soy milk",
    "skim" : "Skim milk"
}

var Coffee = function (beverage, milk, shots, sugars) {
    this.beverage = beverage;
    this.milk     = milk;
    this.shots    = shots;
    this.sugars   = sugars;
    
    this.count    = 1;
};

Coffee.prototype = {
    isEqual: function (coffee) {
        return this.beverage === coffee.beverage
            && this.milk     === coffee.milk
            && this.shots    === coffee.shots
            && this.sugars   === coffee.sugars;
    }
}

var coffees = [
    new Coffee("SB", "skim", 1, 2),
    new Coffee("LB", "reg" , 2, 2),
    new Coffee("LB", "skim", 1, 1),
    new Coffee("SB", "skim", 1, 2) 
];

console.log("Coffees:");
console.log(coffees);

function coffeeInArray(coffee, array) {
    for (var i = 0, l = array.length; i < l; ++i) {
        if (coffee.isEqual(array[i])) {
            return array[i];
        }
    }
    
    return false;
}

function dedupCoffees(coffees) {
    var newCoffees = [];
    var coffee;
    
    for (var i = 0, l = coffees.length; i < l; ++i) {
        coffee = coffeeInArray(coffees[i], newCoffees);
        
        if (coffee) {
            coffee.count += 1;
        } else {
            newCoffees.push(coffees[i]);
        }
    }
    
    return newCoffees;
}

coffees = dedupCoffees(coffees);

console.log("Deduplicated coffees:");
console.log(coffees);