Here we have a coloured pencil drawing of a bottle and a wine glass by Yvonne Ryves. We find that its quite often helpful for our students to see artwork and the photo of the objects that the student has worked from. This often helps give a sense of how elements within the drawing were achieved.
We encourage students to always work from life where they can and take photos of the scene, just in case they need to rework or look back at the piece. Its often helpful to have photographic reference, if the still life set up you are working from has to be moved from time to time while in the drawing process. This way you can get the items in the exact place / viewing angle to continue working.