Scroll down the log from beginning to end. You can even turn it upside down. After, slowly, bend it over the glass from the log will pour water!
This magazine has another wonderful property. It stains the water in different colors, moreover, the desire of the audience. Offer to call a color. Choose, for example, red. Take the log of the bag and pour in there clean water. If you pour it back into the glass, it really is red!
How the water was in the magazine? Between its pages glued a plastic bag. The water in it is poured in advance. If you hold the magazine at an angle of 45°, carefully flipping through the pages, the water has drained. If such a log to take your fingers over the top edge and lightly swung sharply to rotate around its axis, the audience once again to be convinced that the water in it. But if easily bent magazine over the glass, the water will pour into the glass.
To repaint the water to the desired color in the log are pasted several more such plastic bags, each with a handful of different food dyes. It remains only to remember the sequence of colors. After the audience will call the desired color, pour the water into the right bag, and then show off colored water.