A saltine or soda cracker is a thin, usually square cracker made from white flour, yeast, and baking soda, with most varieties lightly sprinkled with coarse salt. It has perforations over its surface. It has a very dry and crisp texture.Some familiar brand names of saltine crackers in North America are Christie's Premium Plus (Canada), Nabisco's Premium (U.S.), Sunshine Biscuits' Krispy (U.S.) and Keebler's Zesta (U.S.) (both owned by Kellogg's).