You remember the T-1000, don't you? What would happen when Arnold shot him or when he would decide to change into something else? Do you remember when he literally became a puddle? Well, finally you can have some T-1000 metal that will melt in your hands. It's called Gallium.
Unlike Mercury, it's non-toxic and is a solid at room temperature. However, warm it up in your hand for a little while and it'll turn into a puddle of liquid metal.