In the 50s, if you looked at a kitchen window of anyone's house the chances were that you would see a packet of washing powder on the window sill as it was used on a daily basis for washing dishes, as well as clothes. A very popular brand at the time was OMO, which I remember as being blue in colour, whilst other soaps were white. Legend had it that OMO stood for "Old Man Out", a signal from flighty housewives to passing tradesmen that they were welcome to linger!
Manufactures have to be careful in these days of international trade to make sure that their product name isn't rude or offensive, or plain silly, in some other language. It's said that this is how the name Omo was chosen - it was decided that it was either meaningless or inoffensive anywhere in the world.
4getmenot, sliced bread first appeared in American bakeries in 1928. At the time, it was advertised under the slogan: "The greatest forward step in the baking industry since bread was wrapped." Thus, the idea of ‘greatest' or ‘best' was associated with the product from the start.