Translation guide
A cold pack is a flexible pack that stays cold, used for cooling injuries or keeping items cold. In Japanese, the term depends on the context: medical/ice packs, reusable gel packs, or instant cold packs.
A pack filled with ice or gel used to reduce swelling or pain.
Traditional ice bag, often made of rubber, filled with ice cubes. Common in medical contexts.
I sprained my ankle, so I'm cooling it with an ice pack.
Reusable gel pack that stays cold; often used in lunch boxes or for injuries. Very common in daily life.
Wrap the cold pack in a towel and apply it to the affected area.
General term for cooling pack, often used for instant cold packs or gel packs.
Please put the cold pack in the freezer.
Loanword from English, used for ice packs, but less common than native terms.
I cooled my head with an ice pack.
A single-use pack that becomes cold when squeezed or shaken, used for first aid.
A reusable pack used in coolers or lunch bags to keep food/drinks cold.
氷嚢 is a traditional rubber ice bag filled with ice cubes, often used in hospitals or at home for injuries. 保冷剤 is a gel pack that can be frozen and reused, commonly found in lunch boxes or for cooling injuries. 冷却パック is a broader term that can include instant cold packs or gel packs. For first aid, 氷嚢 or 保冷剤 are most natural; for lunch boxes, 保冷剤 is standard.
Please put ice in the ice bag.
You freeze the cold pack before use.
Disposable cold packs are convenient in emergencies.