I am a fan of tea and I always walk with my thermos. I have a bottle of the Emsa brand for ten years and I am very happy. It is perfectly sealed. I wanted to go to mug for convenience. Being more than satisfied with the tightness of my bottle I ordered this mug expecting to find the same quality. This is a disaster. The spout is absolutely not airtight. As against the mug keeps tea warm for very long (as a bottle). So I'm using at home .... I am very disappointed. The vagaries of orders via Internet !!!!!
