icebox; ice box
Refers to a non-electric insulated box for keeping things cold with ice, historically used before electric refrigerators became common. May also be used loosely for a cooler or an old-fashioned refrigerator.
My grandmother still cools drinks in the icebox.
In old houses, there was an icebox instead of an electric refrigerator.
Compound of 氷 (こおり, 'ice') and 箱 (はこ, 'box'), literally 'ice box'. The reading こおりばこ is a straightforward combination with rendaku (sequential voicing) on 箱.