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.

Each hot water bottle made in the UK has a ‘flower wheel’ embossed onto the funnel of the hot water bottle, it should look something like this: In the centre of the wheel is the year that the bottle ...