Sign up for
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
Upside-Down Cup is a fantastic cup. It can not only show the chang of etemperature, but also rapidly cool hot water or keep it warm by turning it over. So, it is convenient for us to drink in different seasons.All this is based on a simple theory and a flash of inspiration.