The design generically uses a lever, pumped by the operator, to pressurize hot water and send it through the coffee grinds.

Items such as coffee grinds overwhelm the nose while blood or meat produce a gut reaction.

Spent coffee grinds can be reused for hair care or skin care as well as in the garden.

The addition of tea leaves, coffee grinds, or onion skins to the water dyes the shell purple and the white a light brown, giving the egg a smooth creamy texture.