Still Life Drawing - Digital Illustration

Here is my new digital art.
This composition comprises of four objects.
A teen can, a rubber bottle, a small cup and a book - I combined four of them to get this result.

For the last stage of my drawing, I ended up adding a dark background to one side of it which gave rise to negative space.

The piece was done with AutoDesk sketchbook application and aided with an S-pen. My steps can be seen below:

Thank you.