High heat resistant fully tempered glass (many glass, when filled with hot boiling beverages, might break or result in hair-line cracks)Non-porous material : does not retain any micro organisms, no bacterial contaminationHigh purity certified glass, cadmium / lead: 0%Bpa-free, 100% food safe, hygienic & dishwasher safeGlass is natural material : non-reactive, suitable for all beverages - juice, iced drinks, milk, coffee, tea & alkaline drinks11cm (height), 8cm (diameter), 32cl/320ml (volume)World #1 : number 1 largest glassware manufacturer in the world - ARCPACKAGE:1. 1PCS X 320ML MUG2. 12PCS X 320ML MUG1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.