High Quality White sublimation mugs are AAA Grade, the Highest Grade possible. The AAA Grade quality ensures a smooth, speckles, straight surface with double sublimation coating. Sublimation mugs 11oz blank are ideal for sublimation printing, heat press, 3D vacuum oven. Plain mugs for printing have smooth white surface, straight side and shiny, dazzling finish. Dishwasher safe and microwave safe.