When I travelled to work this morning, I saw a girl with a thermos. The thermos had a gap between the container itself — which holds the liquid — and the outermost surface where the user grips/ holds the cylinder. The user could put a paper in that distance so one could customize the thermos. The outermost surface was transparent so it enabled you to see the paper you put in between. The girl had the same pattern as the old wallpaper that we had at the guest cottage at the summer house.