The fact that women increasingly head for higher destinations means that there is a need for advice which especially covers the female anatomy. After testing your compact and easy to handle Pibella models which worked immediately (without spilling a single drop), I can recommend your unique urination system, also in my high-altitude medical guidebook!
Prof. Dr. Klaus Mees, high-altitude physiologist, Ludwig-Maximilians-University, Munich, Germany
Book: Höhentrekking und Höhenbergsteigen, ISBN 978-3-7654-5493-6,
Publishing house: www.bruckmann.de