I saw the Holy Grail, All pall'd in crimson samite.
(Tennyson, Holy Grail)

They seemed to seek some Hofbrauhaus of the spirit like a grail, hold a krug of Munich beer like a chalice.
(T. Pynchon, V)

This equipment can be used to counter heat-seeking missiles such as the Soviet SA-7 Grail shoulder-fired weapon, now extensively deployed in Third World countries.
(Daily Telegraph, Nov. 22, 1985)

We can't go doddering across Malaya behind an inspired crackpot following the Holy Grail, can we?
(H.M. Tomlinson, Gallions Reach)

The Edge was Fox's grail, that essential fraction of sheer human talent, nontransferable, locked in the skulls of the world's hottest research scientists.
(W. Gibson, New Rose Hotel)

Perhaps you see very little link between the Charles of 1267 with all his newfangled French notions of chastity and chasing after Holy Grails, the Charles of 1867 with his loathing of trade, and the Charles of today, a computer scientist deaf to the screams of the tender humanists who begin to discern their own redundancy.
(J. Fowles, The French Lieutenant's Woman)