Half Full by Scott Alexander & Puck
Half Full is yet another effect in Scott Alexander and Puck's line of powerful commercial magic. It is based on a long-forgotten trick called "Milkan," which was a favorite of Faucett Ross. 

Half Full is a versatile trick that can be a quick opener, or a full five-minute routine of comedy and audience interaction. In fact, when Ross wrote about this type of effect, he said, "To my mind, this has no superior as an 'opener' and would be excellent with which to open a kid's show, yet sophisticated enough for Cardini." Half Full features five different performances on the training video. Three involve audience interaction, and two are startling openers that Scott and Puck call "Glass-Tastic," which are based on Ross's original handling of "Milkan." 

Half Full has the added bonus of allowing you to deliver a positive message. It encourages your audience to watch magic as optimists, rather than pessimists, and believers rather than skeptics. Whether you are looking for a quick visual opener, or a full five-minute magical interlude that has your audience completely engaged and entranced, Half Full has everything you are looking for and more!