Just an exercise in 3d geometric shapes that turned into something else. Works pretty well. The walls keeps the dip concentrated in the middle even with very little dipping fluid (soy sauce in my experiment). Also works as a chopstick rest.10% infill works fine. Make sure the roof thickness is at least 1.5mm. ABS, obviously since it's food safe. The angle of the walls allows for no-raft/no-support printing pretty well. A raft can be used, but is not really necessary.