Below is a triangular shaped ring stack with corresponding shapes to stack. The shapes are cut out of detergent or dishwasher soap bottles.
![](https://i0.wp.com/2019.recyclingot.com/wp-content/uploads/2023/10/triangle-stack-1.jpg?resize=496%2C473&ssl=1)
A simple cardboard, plastic or metal box in a rectangular or square shape may also be used as shown below:
![](https://i0.wp.com/2019.recyclingot.com/wp-content/uploads/2023/10/rectangle-stack.jpg?resize=397%2C529&ssl=1)
Below is a triangular shaped ring stack with corresponding shapes to stack. The shapes are cut out of detergent or dishwasher soap bottles.
A simple cardboard, plastic or metal box in a rectangular or square shape may also be used as shown below: