Working on what will be some glass jars. Fairly simple, just cylinders and some extrusion and beveling here there:

Making the lids I just separated a loop from the body of the jar, and then more extrusion and a grid fill on top:

I selected a few vertices on the top where I wanted some holes to be, and used the “circle” option in Loop Tools:

Then I just deleted the vertices I had selected, and BLAMMO! I also resized each hole so they weren’t all uniform:

Adding a sub-div modifier smoothed out the hole edges, but they were perfect circles so I pulled in some of the vertices to misshape the holes. Also, pulling down the hole cuts a little gave them some indentation.

