Firstly, unscrew the cap and flip it upside down. Secondly, place the flower (or other product) in the center of the cap. Finally, place the storage compartment bottom-side down on top of the flower and, while securely holding the cap, begin to grind by rotating the container continuously until the product is ready. Now, enjoy! https://collectivesupply.com/product-tag/grindtainer/ It works like a charm! Not only did it do a great job of grinding up the sticky icky, but I may actually prefer (for joint-rolling purposes, at least) the slightly larger pieces of herb left by the GrindTainer. The GrindTainer is also a great, inexpensive way to have the convenience of a combo cannabis grinder/container on, say, a vacation or camping trip, without putting your luxury grinder at risk of loss or damage. With the disposable GrindTainer, you can take it along, relax and enjoy using it without stressing if something happens to it — which is, after all, where the “disposable” part comes in! *Actual Size, Shape, Color, and Decoration May Vary. While Supplies last.