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Milk is the third most wasted food and drink product.
Customers of a leading supermarket chain are being asked to use the "sniff test" to see if their milk is still drinkable.
Marks and Spencer is removing use-by dates from its fresh milk and replacing them with best-before dates.
Milk is the third most wasted food and drink product, after potatoes and bread.
A typical household is estimated to throw away 18 and a half pints of milk a year.
M and S says the move will help customers save money and cut down on waste by giving them more time to consume the milk they buy.
Ballymaloe Cookery School Chef and Cullohill's Darina Allen, says we should use our senses when deciding if something is fresh: