A prepackaged dry mix for making biscuits, pancakes, and other baked goods from, to which you only have to add liquid ingredients such as milk and/or eggs to. For people who can't be bothered to keep separate packages of flour and baking soda and other dry ingredients around the kitchen. Though belgand points out to me that the version which comes in a plastic bottle to which you add the other ingredients and shake to make batter can come in handy on camping trips. However, this still leaves the uses of the version sold in cardboard boxes in question.