Officially titled 'Boxbands' these four way elastics bands sure look powerful. However, the site loses its creativity when it explains the joke: "Sample shown above holding a Nuclear War box together".
Perhaps the real nugget of genius is not the rubber bands themselves, but the idea of using such hyperbole in marketing. The concept immediately gets the point across, that these bands are like no other.
Implications - Also noteworthy of the 'Boxbands' marketing is the vintage aesthetic they employ. It hearkens back to the days when propaganda posters all had a vintage pop-art sheen to it even when it was new and fresh out of the over. What better way to sell your product than through propaganda?