Bottles - Digital Drawing

Here is my new digital art.
Once again, I tried making a still life drawing and this time, I opted to use bottles.

I placed two glass bottles on a ground and observed it from one angle.

I started with outline sketches of the objects before introducing shadings by using simple lines. After that, I proceeded in using blurring to add more shades to create tones. I decided to add a few designs at the last stage.

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

Thank you.