Thermos Stainless Steel Travel Mug This stylish travel mug has double wall foam insulation that retains hot or cold temperatures. Its 16 Oz capacity is great for coffee. The unbreakable stainless steel exterior is easy to clean finger prints and has a easy grip to prevent spills. The Thermos Foam tumbler fits in most automotive cup holders. The sweat proof design will not leave water rings spill resistant slide lock. Hand wash is recommended.