Exercise : Jars and jugs

Here I am drawing bottles and glasses (collection of six cylindrical objects) and am trying to suggest, as with box exercise, form and volume paying attention to the drawing of the ellipses.

I have approached this exercise drawing free hand i.e., I have not use rulers or technical drawing equipment... my excuse for some of the not so vertical lines in the drawing of the bottles

Pencil drawing 1:

Pencil drawing 2, slightly more elevated view point:

Pen drawing: