The Boomerang Wok by Nikolai Carels allows you to flip omelets back onto themselves or cook without flinging food out of your pan. The pan has a strategically-designed inner lip that curves inward to keep food from flying over the edge.

From the website:

Stir-frying enables you put a delicious, varied and healthy meal on the table in no time at all. Unfortunately, when stir-frying some of the ingredients do tend to end up next to the pan. However, with the Boomerang Wok this is a thing of the past! Thanks to the unique patented cupped edge of the Boomerang Wok, the ingredients can be turned with a simple movement of the spatula. The ingredients always end up back in the pan.

The Boomerang Wok not only makes stir-frying a bit easier, but larger pieces of food, such as a fillet of fish or meat can be turned in no time at all using the unique patented cupped edge.

The Boomerang Wok means it is no longer necessary to lift up the pan; the skills of a Chinese chef are incorporated in this pan.

Stir-frying has never been as much fun and as easy, and the cooker stays clean!