From Longman Dictionary of Contemporary Englishpunnetpun‧net /ˈpʌnɪt/ noun [countable] British EnglishDFUTM a small square box used to hold soft fruits such as strawberries
Examples from the Corpus
punnet• If you do that, 92p should give you not a punnet but a bucketful.• Birds, said George, he'd have taken the punnet too. 