menu = {
    "espresso": {
        "ingredients": {
            "water": 50,
            "milk": 0,
            "bean": 18
        },
        "cost": 1.5
    },
    "latte": {
        "ingredients": {
            "water": 200,
            "milk": 150,
            "bean": 24
        },
        "cost": 2.5
    },
    "cappuccino": {
        "ingredients": {
            "water": 250,
            "milk": 100,
            "bean": 24
        },
        "cost": 3.0
    }
}