How to do it

First thing you need to do is to save this picture (below it’s the rocket body), and print it. If you don’t own a printer you can easily just draw the body of the rocket. When you have a paper model of the body you need some kind of light cardboard (like cereal box (I personally think cereal box is the best.))

If it is over sized scale with paint or something else program, It should be about about 1.5-2 inch long (3-5 cm) printed on paper, if you draw by hand draw straigth to ligth cardboard.

How to use it

You need alkaline (pH over 7) detergent. This trick is based on surface tension. Put much water on sink and when drop a drop of detergent  at the middle of the hole it should glide (it removes surface tension and forces the rocket to move towards.

Do you look for a water bottle rocket that flies up

You tried to get that, no problemm here is link for it, or if you think this is cool you can go to http://quazen.com/recreation/crafts/how-to-make-water-bottle-rocket-that-flies-up/