The results are hilariously inaccurate but I quite like them! I also really enjoyed this little quick exercise and it could be good one to use to 'loosen me up' before starting a bigger project if I'm feeling nervous.
I then went on to explore the mug further making quick sketches with my left hand so I had to concentrate very hard and finally with my right hand. The last sketch is still quite tentative and suffers a lot from too many outer contour lines where I've been trying to correct the ellipses. I'm hoping this will improve as I practise more and more.
Over the following few days while I was away I did numerous blind contour drawings. I've included a selection of the results. This technique is an effective antidote to looking at the paper too much as occurred with the boxes and books exercise.