Simply put, a steamer is a warmed, milk beverage similar to a latte, but without espresso. A latte typically has some sort of caffeine or coffee base, where a steamer is made primarily with steamed milk. You may see the term latte used interchangeably, but I prefer to avoid it in this case as the entire point of this drink is to help you sleep. Instead of dairy milk we are of course using almond, oat, or cashew here.