reporter: bernd sauer has now made it to the checkout.anks to the foodloop discount, he's saved 2 euros on an overall bill of just under 9 euros. so, could he imaginesing an app li this in future? bernd: yes. it's a good way of saving money and helping to ensure things don't get thrown away. reporter: but he'll have to wait a while. the app is still only a pilot project in germany. the major supermarket chains have yet to sign up. host: here in germany, several initiatives are trying to prevent the waste of food. the idea behind one of them is so simple that it sounds like something my seven-year-old daughter could have come up with. just stick what some have left spare into a big fridge and everyone can come and take what they need. of course it's slightly more complex than that, but not much. one of the places this has put into practice is berlin. there more than a dozen public food sharing fridges are located. in the whole of germany, the number of these food savers has risen to more than 120. they are filled by some 8000 individuals a