I also did that with the bottom of the lid. Before i glued started gluing the lid together i cut whole in one of the circles. Then i measured the circumference of the bottom part of the lid to had the details of the sides. Then I glued rectangles on the sides and sand papered the top edge to give it a smooth edge which the lid does have. The only part i had a hard time with was the thing that connects the bottom and top of the lid together. I ended up making it several times.
When making it i had three ideas on what it could have been. One i was going to make a cup and drink out of it. Two i was going to make it a hat, and that is what i ended doing. The third one is a toilet seat.
|the top of the pepper shaker|
|the bottom of the lid with wholes|
|all together minus the floppy thing that connects it|