You know how companies used to make flour sacks with pretty flower patterns on them because mothers would make dresses out of them for their daughters? We should bring that back. Paper bags designed to be reused as wrapping paper. Jars of jam designed to look nice filled with pencils or homemade sauces. Fabric that's high quality enough to use as a patch.
A 50-kilogram anvil floats perfectly on the surface of mercury, because the density of the steel from which it is made is almost half the density of mercury.