I had bought the cup for a longer ride in the morning. Before filling the fresh coffee I've rinsed the cup hot. This meant that I had despite cautious sipping neat burned me half an hour later while driving the tongue. Which meant that I could not drink the coffee in the decisive period.
And that deserves 5 stars, the insulation has her job more than fulfilled.
After 4.5 hours, then I could drink good coffee.
Buy recommendation.
