This silly little holiday mug features a vintage Santa illustration and a not-so-vintage call to help Santa find his hos. Let's get looking. Maybe they're at the bottom of the Irish coffee you're (hopefully) drinking from this funny Christmas mug. Our vintage 12oz reproduction enamel mugs are made from a thick enamel-coated steel. They are heavy (for enamel mugs--still lighter than ceramic), smooth, wonderful to drink from, and crazy sturdy. Dishwasher safe. These are steel under enamel. So please don't use them in the microwave.