Liquid in a glass visibly diminishes from a glass full, to a fraction of the original contents. You can pour a glass full of liquid into a paper cone, from where it vanishes. Or hold the glass at arms length, and place a straw in your mouth. And as you suck through the straw at the other end – the liquid visibly diminishes. Made of plastic, the glass opens for easy cleaning. A large size glass (5″ tall x 3″ diameter). This utility prop is supplied with many ideas for use.