Mighty Mug® is the world's first travel mug powered by SmartGrip®. This patented technology allows Mighty Mug® to grip to your desk when you bump into it. Prevent spills as Mighty Mug® instantly grips to any smooth flat solid surface but lifts naturally like any mug. Perfect! BPA Free plastic, Double wall construction keeps drinks hot or cold for longer. Top rack dishwasher safe. Gift box packaging. 0.47L