Inspired by what ancient Chinese believed “the heaven is round, and the earth is square”. This structure makes the cup can be folded, but when in use, the mouthpiece remains round and ergonomic like ordinary cups. FoFoCup can be reused more than 10,000 times and is safe up to 120 ˚C. With a cup can be folded to a slice, more people will be willing to bring reusable cup and reduce billions paper cups wasted every year. Parking device holds the lid from swing. Valve for straw for iced beverage. Shape of drink hole is ergonomic to fit your lips.