The present invention concerns a pouch for collecting liquid excretions for collecting liquid human waste, said pouch comprising a first and second wall sealed together along their periphery defining an inlet top portion and a bottom portion defining a collection chamber, an inlet opening provided in the top portion of the first wall, and an anti-reflux film provided in the top portion between said first and second walls, wherein the anti-reflux film is sealed along its lower periphery to the first wall by an anti-reflux seal across the first wall, and wherein a plurality of spot welds are provided above the anti-reflux seal and wherein a plurality of slits are provided in the anti-reflux film between the anti-reflux seal and the spot welds.