if it were me, i would use a tin can, or a glass jam jar or something. figure out all your measurements (i need one cup of this, so that will fill to *this* line, then half a cup of that, which brings the level up to *here*)
do it all with water first and then pour the real stuff into your can or bottle or whatever.
do it all with water first and then pour the real stuff into your can or bottle or whatever.