ice rocks by dave hakkens from netherlands

The metal silver has some very distinctive properties. These properties include a very high thermal
conductivity and antibacterial properties. With these properties in mind I have come up with the concept of silver icecubes.

Each cube is filled with a liquid with a very low melting point such that, in the freezer, the liquid does not turn to a solid. These silver cubes are placed in the freezer and due to the silver's very high thermal conductivity, they freeze almost instantly.

An added bonus is that your drink does not get diluted with water and the drink will look great thanks to silver's metallic mirror finish which will reflect the light coming through the glass