Above is an overview. Here are few more interesting product sketches!

 

Below is a bottle sketch, done quickly with bold marker pen to understand the inner geometry and structure.

And then, further refinement, capturing the the inner as well as surface level details, positioned at an angle that communicates well.

Another day to day product. You can guess the charger, can't you? Replicating the original one and adding some twists in details to understand the product skeleton and balance better!

A really complex bottle cap I found, beautifully sitting on a friend's water bottle, waiting to sketched in all its grace! And many had tried replicating it but the cap stood strong in its complexities, not at all easy to figure out its curves. I took the challenge and jumped into it, excessively sketching out its all possible curves and planes, and finally could figure it out completely.

Cheers!