Things You'll Need:
- dry ice
- water
- plastic bottle (plastic only)
- friend with cellphone
- gloves
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Step 1
Make a hole in the cap. Make sure it's not too big or it will reduce thrust and power. It should not be too small either, or there will be an explosion.
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Step 2
Find a way to seal the hole with something removeable. For example, tape is good.
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Step 3
Use any method to provide pressure without torsion (twisting), such as dry ice with water, or pump air in from a bike pump.
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Step 4
Put the cap on with the pressure item in the bottle. Make sure the hole in the cap has tape or something removeable.
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Step 5
# Let the pressure build up inside the bottle, not too long or there will be an explosion and not too short or there will be no thrust.
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Step 6
8. When the pressure is ideal, remove the tape quickly. The pressure should blast out the hole for acceleration. The rocket's pressure will accelerate it and it will go 10-25 meters.
