STAINLESS STEEL ESPRESSO MAKER: Biggcoffee stovetop espresso maker is stainless steel to be more durable and to heat up faster. Upper Section: 18/10 stainless steel 0.6 thick, Water Chamber: 18/0 stainless steel 1.0 mm thick. Compatible with all stovetops EASY TO USE: Simply fill the lower chamber with water, add ground coffee or espresso to the filter, and place on stovetop. Within minutes, delicious, bubbling cups of espresso will fill your pot. Remove from heat and enjoy CLEANING: Handwash only despite its stainless steel base