Here’s another way to peek under the cap to see if you could win as opposed to the tilt method. What’s the trick? REFLECTION. Get a flashlight, tilt the bottle slightly, and use the surface of the soda as a mirror! If and when the soda folks give away a trip to space via a bottle cap promotion, I’m going to have to do this. [via] Link.
See under any cap (like for Pepsi iTunes) without opening it!