To mark World Water Day, this mailing was sent out to companies and the press. The letter inside can only be read when held under water – proving that water really is the source of all knowledge.
“Without water, knowledge can’t flow.”
Advertising Agency: Duval Guillaume, Antwerp, Belgium
Creative Director: Geoffrey Hantson
Art Director: Gilles de Boncourt
Copywriter: Eric Becker
Released: March 2009

