This is an exercise from page 26 Basic Single Objects of How to Draw Everything by Barrington Barber.
Here are - a pastel sketch (very quick) and a pencil drawing (an hour or so). The bottle was in a different place each time.
The pastel sketch seems much better than the drawing, even though the drawing took so much longer. The drawing looks terribly laboured, partly because I did it first of all with an hb pencil which was too hard for the shading (and only added a bit of b later).
What was difficult with the drawing was the shadow - it should have been easy but somehow it didn't look right. I think I'm gradually realising what is wrong with the shadow - please see next post of teapot.