Amid the changes being seen in the types of food consumers are buying and in how they shop, the world's major food manufacturers are seeing their sales come under pressure and are looking at various ways to try to breathe fresh life into their top lines. Some have set up accelerator and incubator programmes to invest in fledgling companies. PepsiCo's European incubator, Nutrition Greenhouse, has returned for a second year and Dean Best spoke to the US giant's Juan Ignacio Amat to find out more.