How are you supposed to measure you aquarium additives? Quite often aquarists just grab something from the kitchen (or eyeball it). Once used for aquarium additives one can feel uncomfortable using the cooking container for measuring food again.
These affordable plastic 50 ml Measuring Beakers are the solution. Each Beaker has a marking for each increment of 10 ml as well ask markings for every half fluid ounce (up to two fl. oz.).