If you’re referring to the viral banana-storage trick, the kitchen item is usually plastic wrap or cling film.
🍌 The trick
When bananas are kept together, they release ethylene gas, which accelerates ripening. Wrapping the stem/crown of the banana bunch tightly with plastic wrap can slow the movement of ethylene around the fruit and may extend freshness somewhat.
For even better results:
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Separate the bananas once they’re ripe enough for your preference.
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Wrap the individual stems/crowns with a small piece of cling film.
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Keep unripe bananas at room temperature rather than in the refrigerator.
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Once bananas are ripe, refrigeration can slow further ripening; the peel may turn dark, but the fruit inside can remain good for longer.
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Keep them away from other ethylene-producing fruits such as apples and ripe avocados if you want to slow ripening.
The claim that this will always make bananas last exactly 10 days longer is too specific—how much longer they last depends on temperature, ripeness, variety, and storage conditions.
