here a cheap an cheerful tool for you go into a scooter shop that sells vespa/piaggio or deals in old scooters such as lambretta and ask for an oil measuring jug these cost less than £1 and have graidents molded into the jug at equal intervals great for mixing paint ratios/ resin ect and are small enough to fit in you pocket if any 1 wolud like to see one
email me #:-)