2piece titaniumcoated 304 stainless steel mini steamer set, black color. This mini steamer needs to be used with Sierra cup that is sold separately. Key benefits Durable construction: 304 stainless steel with a titanium coating resists corrosion and makes oil and food residue easy to remove. Dishwasher safe for simple cleanup. Even cooking: steam holes distributed across the bottom allow tight steam circulation for uniform heat distribution and fluffy results. Spacesaving stackable design: stack identical size steamers to cook multiple items at once and remove layers independently as they finish. Compact capacity: each steamer is 2.4 inches 6 cm deep, suitable for steamed buns, xiao long bao, sliced fish, pieces of meat, corn segments, pumpkin slices, and similar items. Clear compatibility: designed for use with a Sierra cup. Sierra cup sold separately. Practical performance Efficient steam circulation reduces uneven heating and helps maintain texture and moisture. Lightweight and easy to handle, making it convenient for quick steaming tasks. Lowmaintenance finish that withstands regular use and is safe for dishwasher cleaning. Use scenarios Home kitchen: steam dumplings and small buns on the stovetop using a Sierra cup as the water reservoir. Small dinner or meal prep: stack two units to prepare different ingredients at once and remove layers as items finish cooking. Lightweight outdoor cooking: pair with a Sierra cup for simple steaming while camping or backpacking. Important notice Do not allow the water in the Sierra cup to boil dry. Fill the Sierra cup with enough water before cooking and check the remaining water periodically while steaming.