This mug looks like it was just tucked away for years and not used.
Two puffins taking a dip on the front of the mug, and if you are left-handed, then you will only see the backside, which has no decoration. It seems unfair to lefties.
This is the classic travel mug shape that started in the 1970's. I think it was meant to sit on the padded dashboard of cars and not spill. Did that really work? No idea.