a kitchen storage bag filling device including a resilient sheet of water - resistant material having an interior portion and an exterior portion , separated by a pre - scored arc . a user grips and squeezes the interior portion of the sheet to bend the sheet along the pre - scored arc , thereby creating a free - standing funnel - like structure . the interior portion is inserted into a plastic bag and the plastic bag is held open to increase the ease of filling the bag with liquid or solid material .