Insulated box for frozen food fixed in supermarket trolley has hinged wall that rises under lid of box when trolleys are nested

摘要

The insulated box (2), designed to remain in a supermarket trolley and hold frozen food purchases, has four walls (4.2), a base (6) and a hinged lid (5). One of the walls is hinged at the top so that it folds inside the empty box beneath the lid when trolleys (1.1, 1.2) are nested together.