If you want to go swimming and don't have anyone to apply cream to your back, you know the problem. Those areas of skin on the back that are not accessible with the arms usually suffer a lot. Migros has great sun creams. Wouldn't it be possible to design a kind of film with sun cream that covers roughly the area on the back that is not accessible, i.e. approx. 20 x 30 cm? You could lay it on the floor (with a towel underneath!) and lie on it. The film would preferably be made of recycled material and could then be used like a towel for applying cream to the rest of the body. What do your sun cream managers think of the idea? :)