The SunRocket is a must for the person who wants to ensure that they have the ability to heat and purify water without any fuel or battery requirements in an emergency or survival situation, even from snow! Using just the suns energy and excellent design, the SunRocket enables you to get hot water, and keep it hot. Great for making hot drinking water, boiling water for purification, rehydrating foods, first aid uses, and more. Think of it as a thermos with sunlight concentrating and absorbing properties. Lightweight in its construction, but durable, the SunRocket is a key piece of your preparation strategy.FEATURES. Utilizes an evacuated tube boosted by reflective panels to heat and boil water even from snow. Useful to purify water for drinking or medical use.Water can be heated in as little as 30 minutes (weather dependent).Pressure release valve. Functions as a thermos to keep water hot for hours after its heating cycle. Weather and scratch resistant, compact and lightweight. Quality materials under ethical and environmentally sensitive manufacturing processes.Specifications.Dimension. 45x11x11cm (17.7x4.3x4.3inches).Volume. 500ml (17oz).Weight. less than 1kg (2.2lbs).Color. Black.Materials. Evacuated vacuum glass tube made from Vycor glass (95 percent silica, high temperature and thermal shock resistant) and copper aluminum absorption. Reflective aluminum panels, high quality scratch and weather resistant plastics, pressure release valve.