Trapped Ping Pong Ball

Your last good ping-pong ball fell down into a narrow metal pipe imbedded in concrete one foot deep. 
How can you get it out undamaged, if all the tools you have are your tennis paddle, your shoe-laces, and your plastic water bottle, which does not fit into the pipe?

Ans:
All the tools are random things that are not going to help you. All you have to do is pour some water into the pipe so that the ball swims up on the surface. And if you say that you don't have any water, then think about what you drank today and if you can use that somehow :-)