The Longaberger White Green Painted Ceramic Coffee Mug Set is a charming two-piece collection perfect for both hot and cold beverages. With a round shape and a classic color combination of white and green, these mugs are suitable for all occasions and are ideal for serving two people. Crafted from ceramic and porcelain, these mugs offer a stylish and practical addition to any kitchen or home decor. Perfect for collectors or anyone looking for a unique and high-quality coffee mug set. Microwavable. i appointed out on the inside of the one where there is a little mark and also on the other there is a detailed point where the paint had bubbled. I think i'm not sure what that is exactly, but it was from the firing of the pottery