Practise and challenge your friends! Download the Water bottle Rockets PDF(378 Kb). Adobe Acrobat is required. SAFETY: This rocket uses air pressure to fling a bottle at high speed 20–50 metres.

Islam Makhachev has explained his run-in with Nate Diaz in December, when the pair’s teams threw water bottles at each other ... Makhachev told former UFC champion Demetrious Johnson.

In the video, the friend's air pump fills the bottom of the bottle with air. After the rocket is filled with water, the air pressure increases, causing the rocket to shoot directly into the sky.

Practise and challenge your friends! Download the Water bottle Rockets PDF(378 Kb). Adobe Acrobat is required. SAFETY: This rocket uses air pressure to fling a bottle at high speed 20–50 metres.