The exterior is a stainless steel, inner part is food class plastic (TSP-102)or stainless steel(TSS-101).You can pack the milk, coffee, tea with the other beverage with it. it can hold 70 degrees of Celsius temperatures, using the auto(car) 12 volt power . CAPACITY: 16oz,14OZ PACKING: 36 PCS/CTN NW/GW: 9.7/13.7 KGS MEAS: 46*34.5*53 CM Month production: 80000 PCS