The wonders of modern technology! According to this Del Monte Ketchup advert, by 1953, bottle design had come so far even women could manage opening their Ketchup bottles.
This is some what humorous, but extremely offensive at the same time. Maybe the advertisement was referring to the fact that they just don’t want the “perfect, beautiful housewife” to ruin her perfect manicure? I’m sure that is just hopeful thinking.