Gilmour 362 Professional No Pre-Mix Sprayer is awesome.  Honestly the extra $5-6 dollars it cost over the plastic competition to purchase this is well worth it.  Can be used for fertilizer or washing the cars.  Very easy to use and the teaspoon to tablespoon converter is so easy.  I just unscrew the converter from the top and insert it into the straw suction in the bottle and I'm done.  I filled the bottle with Maxicrop Fish emulsion 5-1-1 concentrate.  The water will mix automatically and dilute it so that's why I used the concentrate directly into the container.  Choose 1-2 teaspoon per gallon and wonderful results on my lawn, flowers, and veggies.  Everything is so green and healthy looking.  I think this sprayer will last a very long time.  Very happy customer.