This mug is layered in stainless steel and lined with plastic to keep your beverage safe warm or cold. 16 fluid ounces will fit in the mug and features the We The People Logo. Celebrate freedom & Coffee at the same time with the travel WTP mug. This sleek, stainless steel travel mugs include a plastic spill proof lid with slide lock and come with an easy grip and curved body. The double wall thermal plastic insulation liner on these custom travel mugs makes them perfect to store your beverages and keep them at an ideal temperature.