This drawing is one of my favorites, it has really good reflections with a lot of contrasts. A key thing to get a drawing realitic is to press hard where it is supposed to be really dark. When you get the darker parts almost black you will get the depth in the drawing and with that comes the realism.
Most beginners don't do this but with a little bit of practice you will see how realistic it gets with a darker drawing. This is my drawing of a Coca Cola bottle standing on a table with black background.
The process from start to finish
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Steem on my friends