27 Ways To Make Your Groceries Last As Long As Possible

Chop spring onions and freeze in a plastic bottle



Prepare a mixture of one part vinegar (white or apple cider) and
ten parts water. Swirl the berries around in the mixture, drain,
 rinse, and put them in the fridge.
The solution is diluted enough that you won’t taste the vinegar.
Raspberries will last a week or more, and strawberries
go almost two weeks without getting moldy and soft.

Wrap the banana stalks in cling film.
Bananas also produce more ethelyne gas than any other fruit,
so keep them isolated on the counter.

And 24 more tips here [link].