An group of innovative students from Mackenzie College in South Canterbury have developed a product to stop water troughs from freezing over.
They have called it the Frostease Flexi-Mat.
The floating mat is punctured with holes to allow water to come through for the cows. The cows provide the 'power' to keep troughs from freezing by pushing on the mat to get at the water.
Amy Hay, Hamish Ryall and Luke Jordan are Year 12 students and part of the school's Young Enterprise Scheme and now they are keen to turn their invention into a long term business.
Over winter they've been testing and fine-tuning prototypes on their parents' farms say there's been a fair bit of interest in the mats from local farmers keen to test them on their own farms.
"Lots of farmers were saying 'if this works we really want to buy it' and 'keep us in the loop and let us know when it's ready for purchase', so we were pretty blown away by that," says Amy.