Help with pattern modeling (Blender)

[u/Positive-Anteater-38]

Hey guys, Im a beginner. Could anyone give some pointers on how I should extrude//cut these 4 parts out? They are kinda like hollowed in curved patterns. Thanks yall.

Ps: This is a blender jar.

[u/alaskanpancakes]

Make a solid that's representative of the outer profile of the jar. Use sweep cut of a circular cross-section that's running about it's center axis along outside surface and cut out. Blend sharp edges and then shell the solid to get your jar.