Pleated Ketchup / Bottle

It is not easy to eat completely and to the end the sources such as ketchup or mayonnaise because the remaining small quantity of ketchup does not flow out well from the bottom of the container. So, a ketchup user sometimes shakes the ketchup container or puts it upside down leaning against the floor or wall.
This ketchup container has folds. How to use it is very easy. You can press the container enough to use ketchup. Then, you don't need to shake or put it upside down any more and can eat up even the small quantity of ketchup remaining in the container.