What I brought my lunch in today...






1) I made the profile of the lid and bowl from the side (to the center), then the ring profile of the container shape from the top.
2) I did a Revolve by Rail with the side profile along the ring to create the basic shapes.
3) To make the bottom shape (the step in) I created the wave shape that wrapped around the bowl.
Took two copies and lofted them together, so I trimmed that from the bowl.
Actually, Boolean Trim did not work - it kept making the bottom half disappear even though "keep" was on, but Merge worked for some reason.
4) I moved the bottom section lower and scaled it in a little. The new gap was filled in with four Blends (thanks to curve Merge).
5) Added the tab.

...simple exercise.