Meaning of “cool bag” in the English Dictionary

british dictionary

"cool bag" in British English

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cool bagnoun [ C ]

uk /ˈkuːl ˌbæɡ/ us /ˈkuːl ˌbæɡ/ UK US cooler bag

a bag made of a thick insulating material that keeps food and drink cold when you are travelling

(Definition of “cool bag” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)