The tumbler maintains its vacuum insulation up to 4 hours of hot drinks and up to 7 hours of cold. With 473 ml volume, it is sufficient, and the removable cover made of unbreakable tritan-kunststoff is transparent, so that you can see the cup content. Multi-functional can either directly from the cup with drunk or through the aperture of the with a shutter reasoned attachment cover. The Cup fits into most standard car holders and is leak-proof. The tumbler is dishwasher-safe, free of BPA and with a silicon surface on the floor for high stability.