Supermarket giant Aldi has issued advice to customers who buy milk in its stores. The discount retailer, which was again named cheapest supermarket in April, has issued advice to customers who buy various staple foods and products from its stores, including milk.

The has just launched its Big Freeze campaign, which urges customers to use their freezers to help cut down on food waste. has teamed up with food waste expert Kate Hall, who said shoppers should use the freezer to make their milk last longer. Specifically, Kate said that for shoppers who need their milk to last longer, you can freeze it flat in a sealable freezer bag. For those worried about milk splitting when it defrosts, you can give it a quick blend and it should be good as new.

Kate explained: "If you find your milk goes sour before you can use it, try storing it in the middle of the fridge instead of the door, it's much colder here and can last up to three days longer! To avoid any leaks, pour half your milk (or more) into a reusable water bottle to lay flat.

"Or, if you need your milk to last longer, consider freezing it flat in a sealable freezer bag in usable quantities; this way it can be defrosted quickly in a dish of cold water. Some plant milks can be suitable for freezing too, but you should always check the packaging first to be sure.

"Don't worry if your milk splits when defrosted, simply give it a quick blend and it should be good as new!"

Kate said: "Using your freezer is such a simple way to press pause on your food so it doesn't end up in the bin.

"Freezing food can help our budgets stretch further, and you can actually freeze a lot more than people realise. The trick is knowing the best way to freeze food and what to do with it after freezing."

New research by Aldi also found that eggs, cucumber and lettuce were among the top foods that people never consider freezing, with as many as two thirds admitting they didn't think they were suitable for it - despite this not being the case if prepared, frozen and reused in the right way.

Customers were also concerned about frozen food losing its flavour (25%) or that they wouldn't like the texture after defrosting (36%).

Luke Emery, National Sustainability Director at UK, said: "At Aldi, we're committed to reducing food waste wherever we can across our supply chain, whether that be working with suppliers to cut down on waste, or marking down prices of items nearing their sell by date.

"Now we're on a mission to help shoppers minimise their food waste too, while getting even more value from their Aldi groceries at the same time. It seems simple, but the research shows that freezing items still isn't something many do - so we want to showcase just how easy that can be."