'Smart fridges' with cameras installed are currently being trialled by 20 families and it's hoped the devices could reduce the 4.2m tonnes of food the UK throws away every year.
Around 20 families in Derbyshire are using the new fridge-freezers - which can be paired with tablets and smartphones - for six months as part of Sainsbury's 'Waste Less, Save More' initiative.
The fridges, which cost about £1,000, have integrated cameras that enable shoppers to see the food they already have so they don't buy duplicate items.
Sainsbury's claims the fridges could reduce the annual UK-wide food waste bill which is around £1.5bn.
List of 'over-bought' items: