This custom travel tumbler has an insulated body made of stainless steel. The top and bottom of this tumbler have a double outer plastic lining. This tumbler can hold up to 16 Oz of liquid and keeps them warm or cold for a long time. It has a twist-on lid enclosure on top with a slide-lock bottle opening. This lid is suitable for single-hand use and to restrict spilling of beverages. This product is simple to handle and can be cleaned under running water. They are also an excellent alternative against synthetic bottles and can easily be stored for later use.