Aquapod Bottle Rocket Launcher with Air Pump. The Hydropod is the most exciting and safest water rocket launcher ever. All you need is any 2 litre plastic soft-drink bottle with a bit of water in it and pump it up using the supplied air pump. By using a safety pull rope; you can launch a bottle up to 30 metres in the air. It has a built in safety-valve that releases pressure to help keep everyone safe from over-pressurizing the entire system. The Hydropod is built to last with high quality durable plastic. Includes air pump and safety pull rope.                                            • Pump Included • Entertain and Educate