Have you ever gotten to the bottom of the cereal box only to find mostly cereal crumbs and dust instead of full-sized pieces of cereal?  Most people throw what's left out, wasting food.  With the help of The Cereal Filter you can separate the cereal you want to eat from the crumbs and the dust you don't.  Just pour what's in the box through The Cereal Filter while holding it over a wastebasket.  The crumbs/dust fall through leaving the edible cereal behind.  I designed The Cereal Filter using SketchUp and printed it out on my 3-D printer using food-safe PETG plastic.