It contains a special membrane that reduces the excessive pressure of the rinsing liquid and creates an ideal rinsing effect. This membrane prevents the rinsing fluid from returning to the irrigator. Rinses well, thoroughly and comfortably. It can be used in any position: when sitting, standing or lying down. The irrigator has been tested in the laboratory and has been proven to rinse well (not spray), efficiently and pleasantly. The extension has a membrane that prevents the return of any liquid and, more importantly, prevents excessive pressure of the rinsing liquid. The extension is smooth and made of special flexible plastic and is easy to insert. Due to the combination of the angle at which the extension is attached to the tank and the flexible neck of the bottle, the irrigator can be used in any position: when sitting, standing or lying in the tub.