The exterior is a stainless steel, inner part is food class plastic(TSP-304)or stainless steel(TSS-103).You can pack the milk, coffee, tea with the other beverage with it. CAPACITY: 16 oz PACKING: 24 PCS/CTN N.W/G.W: 8.2/9.2 KGS BOX SIZE: 13?10?17.5 CM MEAS:42?41?37 CM