Ya-Chu, Chang / Preserving Container

In normal times we stack food container one by one. The previous container is always under the new one. For the convenience, we often just take the top one when we need it. The traditional container has a obvious problem- the food at the bottom is hard to take but also the first one to meet expiration date. S-container can solve the problem.
There is a track on the spiral shelf and we can take any S-container immediately. When we take a container, the near one will slide down along the track. So we can take them according to the order. Also, the shelf is rotatable. We can see and take any container easily.