Coffee grounds can be used to produce biopolymers through the injection molding, a process that involves heating the material – coffee grounds mixed with natural glues and wood grains to make a liquid composite -and injecting it into the mold cavity under high pressure; the molten material would then fill the mold, and conform to its features and shape.

Coffee cups made from spent coffee grounds needs to meet the required performance standards, such as food safety, durability, and heat resistance; also, factors such as mold design, wall thickness, and geometry of the parts, should be optimized in order to minimize the possible defects and to achieve the desired characteristics.

Moreover pieces of furniture, from chairs to tables, can be realized with a percentage of coffee grounds that can arrive up to 100% in some cases, or can be mixed with natural binders, with polypropylene and with jute bags reinforcement.Also, coffee panels and tiles can be produced from coffee grounds mixed with polylactic acid for architectural purposes.