A tube of toothpaste.

The mantle entirely envelops the animal, and forms three apertures, one of which serves for the passage of the byssus and the languette;

And seventy years later the last of Pentonville Road's original arch-windowed townhouses, two-million-quid jobs anywhere else, now wallowed in Withnailesque decay […]

The only difference between an airhead and a beachhead is that an airhead covers 360 degrees whereas a beachhead usually covers 180 degrees. An airhead is two beachheads back to back with the reinforcements and resupply coming by air instead of by sea. … [T]o handle their mountainous proportions there must be in the airhead a sufficient number of trained and equipped airhead service troops.