Icyerekezo cya MOS: Icupa rya Mason rifite umunwa munini ryakoreshejwe nk'ikintu cyo kunywaho, rishobora kugira urutugu, umufuniko ufite ikinyabiziga cyo kunywesha cyangwa akayungurizo ko mu mbere. Ikirahure gikomeye cyakomejwe gishobora kwihanganira ikoreshwa rya buri munsi n'ihinduka ry'ubushyuhe, naho umufuniko uzengurutswa ubuza kumeneka mu nzira ijya ku kazi cyangwa mu birori byo hanze. Rikunzwe cyane ku ikawa ikonje, ku mitobe ivanze, ku mazi y'indimu no ku bigori byarenzwe mu mazi ijoro ryose, rihuza ubwiza bwo mu cyaro n'ubukomere bufatika.