Changes

* The Hippo roller is also used for drip irrigation for example in Zambia where small scale cotton farmers use the Hippo roller to water their crops. * A wireframe that has been designed to attach on to the roller, transforms the device into a movable casualty bed for the sick or wounded. * The same wireframe turns it into a transportable ‘spaza’ shop that includes a shade cover as well as a trolley that can be used to transport products to market. * The Hippo roller has been used in test cases as an anti-personnel demining device, whereby it is rolled along the ground to absorb the blast of landmines when filled with water.