Iwaki Miffy Cup Set of 2 ⚠ One is unused (with a reinforced porcelain sticker), and the other has been used a few times. These are not made of Corelle tempered glass. They are made of reinforced porcelain (with a ceramic-like texture). The unused one was also stored stacked with others, so upon close inspection, there may be small scratches or minor stains. If you are concerned, please refrain from purchasing. m(_ _)m ⚠ Shipping is planned via Yu-Packet Plus. There are size restrictions, so the packaging will be within those limits. Thank you for your understanding and purchase. (^^) Iwaki