Research

1. Zhekai Zhang uses waste coffee grounds to create marble effect on Coffire lamps

https://www.dezeen.com/2019/08/21/zhekai-zhang-coffire-lamps-waste-coffee-design/

2. Coffee Based is a company that focuses on reusing waste materials. Annually, millions of kilograms of coffee waste are produced in the Netherlands alone. Coffee Based turns the lineair supply chain of coffee into a circular one by turning coffee grounds into new products and materials, like bioplastic.
Coffee Based developed two base materials: a sheet material and granulate. Both are made with coffee grounds mixed with a biopolymer. The sheet material is flexible and still smells like coffee. It has a bit of a leather-look. The material is suitable for vacuum forming. The granulate is suitable for injection moulding.

https://materialdistrict.com/material/coffee-based-material/#moved

3. Decafé lamps / bowls

https://www.decafe.es/coleccion-lamparas-y-accesorios/

4. Shoes

German high end sneaker brand nat-2™ presents vegan luxury sneakers made from real coffee.

The 100% vegan, unisex sneaker’s uppers are made from real sustainable recycled coffee, coffee beans and coffee plant, which covers up to 50% of the shoe’s surface, depending on each style.The coffee is applied to a layer and got the natural coffee scent. The feel is very smooth and fine, while you can smell the coffee and see the material’s natural texture.The patented material was developed in Germany and the final sneakers are 100% handmade in Italy and produced under fair conditions in a new family-run high-tech facility.

https://www.baristainstitute.com/blog/ella-takalainen/march-2019/second-life-coffee-recycling-coffee-grounds-something-new

5. STOOL

The brown, grainy tops of this stool and table are made from used coffee grounds that designer Xavier Loránd sourced from cafes near his Mexico City studio.

The designer, who is now based in the capital, gathered leftover coffee from nearby shops. He then paired it with binding materials like plant-based bio-resin, and left the mixture to set in a mould to create the surfaces.

https://www.dezeen.com/2018/10/22/nero-xavier-lorand-coffee-waste-concrete-inedito-design-week-mexico/

6. c2c coffee cup by saleem khattak from Canada

designer's own words: In a perfect world, we would not generate waste (i.e. landfill) or burn fuel unnecessarily (i.e. shipping), but utilize waste products locally in the perpetual circle of cradle-to-cradle consumption.

As an example, the design team chose the disposable paper cup; the ‘C2C’ coffee cup is manufactured at the cafe from the waste stream of the cafe.

It has an interesting diagram about the production process.

7. HuskeeCup

HuskeeCup isn’t your typical cup for joe. Reusable, recyclable, and chip-resistant, the ceramic alternative is made entirely from discarded coffee husk, a byproduct of the milling stage of java production that has scant economic value. The average coffee fiend is responsible for the annual production of some 6.6 pounds of husk waste, according to HuskeeTech, the Australian company that developed the cup. Globally, this translates to more than 1.35 million tons of husk waste every year.

https://inhabitat.com/huskeecup-is-an-eco-friendly-cup-made-entirely-from-coffee-waste/

8. Fungi Factory kit for growing mushrooms in coffee grounds

Northumbia university graduate Jamie Pybus has devised a household system for cultivating edible mushrooms using leftover coffee grounds as a growing medium.

Called Fungi Factory, the kit provides a use for the increasing number of coffee grounds that are currently discarded by UK households.

https://www.dezeen.com/2019/08/08/jamie-pybus-fungi-factory-mushrooms-coffee-design/