Aimed to, but not exclusively, the use at hospitals and similar facilities. It features a body shaped by rectangular plates, anterior and posterior, made out of flexible plastic—or any similar material suited for this purpose—so its side edges are joined together by any process that suits the product forming side wings that extend through the whole longitudinal body of the bag. It also possesses as inferior seal with a plate of flexible plastic—or any similar material suited for this purpose—with substantially squared, round or elliptical shape, its peripheral edge is connected to the inferior edges of the anterior and posterior plates of the bag—through any process that suits the product—shaping inferior wings that go through the whole lower peripheral extension of the body of the bag, that alongside the side wings constitute the bag's proper structure. After the use the gelled content assumes a regular shape, significantly cylindrical, in a way that combined with a scale and the its capacity of standing stable in vertical position it becomes possible to perform a proper bodily fluid balance of the patient.
