Use a clean 1 quart or 1 liter jar. First combine the flour with the baking soda and salt. Then, mix the sugars together before adding to jar to prevent clumping. Then, to layer add half of the flour mixture to the jar, followed by the oats, then the remaining flour mixture. Top with layers of the sugar mixture, then the cranberries, followed by the white chocolate chips, and finally with the chopped pecans.