I use CANNA nuits and they have measuring bulbs at the top of the bottles...however now Ive upgraded the size of my Res. I use an ASDA measuring beaker & I mix them up with an Egg Flipper !! - STELTHY
I use GH flora nutes in gallon jugs with the ketchup style dispensers. One full press is metered exactly 5 tsps. Otherwise I have a shotglass measuring cup.