Which innovative packaging format first made religious texts widely accessible to military personnel during World War II?

Religious texts and philosophical works have evolved in their presentation and packaging over millennia. From scrolls to codices to modern books and digital formats, the 'packaging' of spiritual wisdom has been crucial to its preservation and dissemination. This trivia question explores an innovative packaging development that revolutionized access to religious texts in the 20th century. Test your knowledge of how product design intersects with religious publishing!

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The Armed Services Editions (ASE) pocket-sized paperbacks, including religious texts that fit in military uniform pockets
The Gideon Society's waterproof Bible cases, designed to protect scriptures in battlefield conditions
The Vatican's 'Missale Castrense' (Field Mass Kit), with condensed religious texts in metal containers
Thomas Nelson's 'Faith Defender' series, with bullet-stopping metal covers protecting religious texts