To prove her point, she posted a snap of a large chunk of deliciously green and beautiful avocado - which she claims has been sitting in the fridge for seven days, wrapped in a lettuce leaf.
She wrote: 'I sort of accidentally discovered that I have been throwing away first class food wrap.
'Lettuce leaves, primarily the outer ones that are a bit harder, make for excellent food wrap. Since they're designed for that purpose in the first place.’
She adds: 'It was all good for today's breakfast. Incidentally, lettuce leaves even keep bread buns fresh,' she said.
Many people were blown away by the clever hack.
‘Oh my god who would have known this? I'll have to try it,' said one. ‘I’ve never thought of doing this!’ added another.
Said one more: 'Wow this is really awesome.’
So giving this a go!