I’ve just sponsored a Hippo water roller because it’s a great, simple invention and it will be one of the examples in my book ‘Less is Beautiful’. Here’s already an excerpt from my book:
Modern societies (and certainly larger organizations) have a tendency to make things unnecessary complex. It can be very interesting to learn how ‘the third-world countries’ use ‘Appropriate Technologies’ – a concept to provide simple and easily replicable technologies to communities in need.
The Hippo water roller is a device for carrying water more easily and efficiently than traditional methods. People in underprivileged communities can transport approximately five times the amount of water in less time with far less effort than the traditional method of carrying 20 liters on the head. The first purpose is for water gathering but several other uses have since been discovered. It also acts as a watertight container to keep valuables and clothes dry when going downstream in white water rapids; or as a container to be dropped with life saving contents from helicopters some rollers have been distributed pre-filled with grain or other foodstuff to villages.
A Liter of Light is a movement with the aim to provide an ecologically and economically sustainable source of light to underprivileged households that do not have access to electricity. The invention is relatively simple. It involves filling up a plastic bottle with purified water and bleach and installing in onto the roof of a house. The water inside the bottle refracts the sunlight during the daytime and creates the same intensity as a 55 watt light bulb. In less than a year since inception, over 200,000 bottle bulbs were installed in communities around the world. Liter of Light has a goal to light up 1 million homes by the end of 2015.