Barebones Enamel Cup Set - Set of 2 Slate Gray. Dishwasher safe (hand wash recommended). Our Enamelware rim is heat treated to create a copper-like patina finish. Both the surface and rim can be stripped of its unique coloring by acidic foods such as lemon and some harsh detergents and cleansers. Enamelware is dishwasher safe but we recommend hand washing to help maintain the original look and feel of the pieces. To hand wash: Use a gentle natural cleanser. Soak the products in warm soapy water to help remove baked-on food. Gently wipe away residue. Avoid using abrasive sponges or brushes as this may scratch the surface. Do not microwave. Specifications for Barebones Enamel Cup Set - Set of 2: Manufacturer: Barebones Color: Slate Gray Weight: 0.4 lb Dimensions: 5 x 3.75 x 3.5 in Features: Vintage-inspired design Baked stainless steel rim with copper-like patina appearance Slight variations in color on rim are expected Steel core with speckled enamel finish Raised edges Package Contents: Barebones Enamel Cup Set - Set of 2 Barebones CKW-356: Enamel Cup Set - Set of 2 Slate Gray