Espresso machines constructed without plastic components represent a niche market focused on durability, performance, and flavor purity. Such machines typically utilize stainless steel, brass, and other metals for their construction. For example, boilers crafted from stainless steel offer superior heat retention and resistance to corrosion compared to plastic alternatives.
The preference for metal construction stems from concerns about potential plastic leaching into brewed beverages, particularly at high temperatures. Metal components also contribute to the longevity of the machine, offering resistance to wear and tear. Historically, early espresso machines were exclusively metal, and the resurgence of this design philosophy reflects a desire for robust, high-quality appliances. This approach often aligns with sustainability goals, as metal components are more readily recyclable and contribute to a longer product lifespan.