Transparent Design®Brand mugs are made of 100% ceramic. Does not contain any letter letter. The dyes used are environment. It can be washed in the dishwasher between 40 ° - 80 °. Production high resolution printing technology. Engagement DESIGN with our sales on Aliexpress with our 10 years of experience. We brought you these beautiful designs that we made with our professional team. It is very important to us that you smile every time you look at these beautiful mugs and drink coffee. We will make our popular content and designs by working harder with our professional team. We wish you a good day to sip your coffee. Engagement DESIGN TEAM.