One cup tea cozy

You know the taste of your cup of coffee or tea when it goes cold while you are working or reading or just simply resting after a long days work? Well, I for one, hate it when my coffee gose cold. So I went on a shopping tour to find a tea cozy that is small or big enough for a cup, but could only find one of the size of a tea pot or an egg...! Humm So I decided to design one and there you go, it works both ways since the isolation layer is thermo, it keeps the bevarage hot/warm for longer time and it can also keep a cold drink colder of a longer time ona warm day.