Etape 1Remove all labels from the two jars and clean then so that they are perfectly
Glue the lid of the small jar inside the lid of the large jar with adhesive
foam tape or glue. Make sure that it is placed right in the middle of the large lid.
For a long lasting result, use a two components epoxy glue. In this case leave it to glue a few hours or even overnight.
Paint half of the small jar in black and leave the other part transparent.
Let it dry well.
Build a box with pieces of expanded polystyrene to fit in half of the large jar.
It should just squeeze in.