Abstract: In a shopping cart, in which structures are movable between a first set of relative positions, in which a child seat is defined by the movable structures, and a second set of relative positions, in which the shopping cart is adapted to receive a similar cart nesting into the shopping cart, a cupholder comprises a cup-holding body mounted to one of the movable structures so that the cup-holding body occupies a portion of the child seat in the first set of relative positions. The body is made from a rubbery material enabling the body to collapse to a collapsed condition, in which the body, if empty, does not prevent nesting of a similar cart into the shopping cart, and to return to an uncollapsed condition, in which the body can hold a cup.