I see a very interesting structure - bistable structure: refers to a mechanical or material system that has two stable equilibrium states and can maintain stability under no energy input conditions. The characteristic of this type of structure is the existence of two lowest energy points, which can be switched through external triggering and maintain stability through their own characteristics. Its basic structure should look like a coaster at first glance, so it was made, and the rotating shafts of each component need to be threaded with consumable threads, The coaster comes in two sizes, open and closed, and can be used for cups of different sizes