1) The field rations of some countries seem to have something similar: - United Kingdom: lemonade/orangeade powder - Netherlands: lemon-flavor energy drink powder Source: http://en.wikipedia.org/wiki/Field_ration 2) Here the original ration with lemon powder: "The jungle ration is a United States army ration developed by the Quartermaster's Chicago Subsistence Research Laboratory (as well as the Subsistence Laboratory which determined packaging and packing requirements) during World War II for soldiers in the tropical regions of the Pacific Ocean and Southeast Asia. The ration was designed to be compact and to feed four men in one day, though no clear reason for the development of the ration was ever made. Because of this, the jungle ration (along with the mountain ration) eventually became obsolete in favor of K-rations." Source and further information: http://en.wikipedia.org/wiki/Jungle_ration Some forms of the K-ration contain lemon, but none contain lemon powder: http://en.wikipedia.org/wiki/K-ration 3) Here some pages with lemon powders products: http://www.guamgifts.com/Detail.bok?no=33 http://spicesamerica.com/lemon-powder.html http://www.coconutvilla.com/extras3.htm http://powdery.21food.com/showroom/32384/product/Instant-lemon-powder.html http://www.design-emporium.com/storefront/products/Mixes/4424.htm http://www.shopping.com/xDN-nutrition-lemon_powder http://www.etsy.com/view_listing.php?listing_id=9704558