Xu Wusi’s Zero Gravity Coffee Cup Design Explained

If you’ve ever knocked over your coffee cup and thought, 'What if it stayed like that on purpose?'—you’re not alone. Shanghai-based designer Xu Wusi had that moment, and rather than just laugh it off, he turned an accidental tip into a full-blown design project. The result? A deliberately tilted coffee cup that looks like it defies gravity while sitting perfectly upright on your saucer.

The zero-gravity coffee cup tilts at an angle thanks to a specially designed ceramic base that slots into a sloped hole in the saucer. It took six months of focused design work—and another half-year of trial-and-error production—to perfect.

Why Tilt a Coffee Cup?

The entire concept began when Xu accidentally knocked over a cup. Intrigued by the look of the tipped vessel, he decided to design one that looked like it was frozen in that moment. He envisioned it not just as a gimmick, but as a piece that conveyed his personal style—technical, playful, and a little romantic.

How the Tilt Works

The secret is in the base. A thin, precisely angled ceramic slice at the bottom of the cup inserts into a matching slanted hole in the saucer. This allows the cup to sit stably at an intentional angle. The cup can also be used upright, depending on your mood or table setup.

Design Philosophy & Aesthetics

Xu, who has a background in software engineering, wanted the cup to reflect “a strong institute of technology vibe, with a touch of humor and romance.” The form is modeled after an abstract flight capsule. The tilted side is sharply cut to enhance the visual effect of leaning, adding dynamic light and shadow play across the pure white ceramic.

The handle? It’s an abstracted pair of “angel wings,” carefully shaped for ergonomics. When you hold it, the wingtips rest naturally under your middle finger, making the cup feel almost weightless. The outside is decorated with illustrations resembling physics force diagrams—with a poetic twist: “The combined forces of love cause weightlessness, counteracting gravity and resistance.”

Material Selection & Production

Xu didn’t rush production. He knew he wanted a ceramic that could stand the test of time, so he chose high-temperature white porcelain despite its tougher firing process. After evaluating options from Jingdezhen—where the porcelain was too cool-toned and hard-edged for his taste—he settled on Dehua, Fujian’s famed “ivory white” clay, known overseas as “China White.” It has a slight pinkish tone that softens the overall look.

The actual firing process involved serious trial and error. The cup’s handle, made of soft clay, would droop under its own weight during firing, making the angle hard to control. The saucer’s slotted hole kept cracking due to thinness and heat stress. Even after firing, misalignment between the cup’s base plug and the saucer hole was common. It took over a hundred prototype firings and countless adjustments to the mold and firing curve to get everything to fit and hold together reliably.

Frequently Asked Questions

Who designed the zero gravity coffee cup?

Xu Wusi, a Shanghai-based freelance designer and software engineer, created the zero gravity coffee cup. He was inspired by an accidental coffee spill that led him to conceptualize a cup that appears to defy gravity while resting normally on a saucer.

How long did the design process take?

The pure design phase took six months. The overall process, including production trials, lasted about a year in total due to the complexity of materials and firing techniques.

What makes the cup appear to be tilting?

The cup sits at an angle because its base has a thin ceramic slice that slots into a matching slanted hole in the saucer. This design holds the cup stably in a tilted position while still allowing for upright use if desired.

Why did Xu choose high-temperature white porcelain?

Xu selected high-temperature porcelain for its durability and hardness, even though it’s harder to fire and has a lower success rate. He wanted a product that would last, avoiding the wear issues of low-temperature porcelain.

Where does the cup’s clay come from?

After testing porcelain from Jingdezhen, Xu chose clay from Dehua, Fujian, known for its “ivory white” color with a slight pink tint. This material is internationally recognized as “China White” and matched his aesthetic better.

What’s the story behind the angel wing handle?

The handle is an abstract representation of angel wings. It’s designed ergonomically so that when you hold the cup, the bottom of the wings rest naturally against your middle finger, making the cup feel almost weightless in your hand.

Recommended FrontStreet Beans for Unique Brewing Experiments

Try brewing with FrontStreet Coffee’s Ethiopia Humbera for bright floral and citrus notes, or their Yirgacheffe for juicy berry and stone fruit qualities—both shine when brewed with care, much like the care put into Xu Wusi’s tilted cup. For something deeper, their PWN Golden Mandheling offers sweet caramel and almond balance. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.