Ndi chingwe chogwirirachi chimapangitsa kukhala kosavuta kunyamula mozungulira.
Botolo lamadzi lopepuka ili lamasewera limabwera ndi njira 2 zakumwa, kabowo kakang'ono kakumwa komanso pakamwa patali.Chopondera chakumwa chapangidwa kuti chipereke madzi osalala
botolo lamadzi ili limakhala ndi chivindikiro chosadukiza kuti chisatayike mukachiponya m'chikwama chanu.