How I did this : I placed the jar on its side on a table with frosted glass.
I put a 40W bedside table lamp underneath the glass.
Inside the jar I put a piece of semi-transparent baking-oven paper,
to prevent the pattern on the back of the jar disturb the scene on the front.
The rest of the room was lit using a 500W halogen light,
bounced against a piece of gold colored cardboard.

Here you can see the setup for this image.