Taiwanese glass cobalt mug has a blue typography. It is a mug with a generous size of 350ml and is highly utilized such as a glass of water, juice, and coffee cups. Because Taiwan Glass is a product produced by strengthening at high temperatures with rapid temperature changes, the marks caused by wrinkles, tears, blisters, and moulding naturally occur during the production process. As the middle moulding line may not be smooth, exchange or return is not possible.