If you drink boxed wine don’t toss the box when no more wine comes out of the spigot. I tilt the box forward and end up with anywhere from one to three more glasses of wine.
A note to those of you who turn your noses up at boxed wine: if, like me you can’t drink an entire bottle in one sitting, boxed wine is a better alternative than pouring bottles of wine down the drain. For those of you who cook with wine this is a good way to keep wine around without it spoiling.