I used a 20 oz bottle instead of the recommended 2 liter and I much prefer this because I still have ample shrimp to feed my 3 small tanks. The only problem with this is the salt and eggs are premixed and there is no good way to separate the two to make a smaller measurement. Took over 3 days to hatch and I think I only got about 70% of the eggs hatched but I think this is because I was hatching at a much lower temperature (73 F) than recommended (82 F?). After hatching I poured the entire contents over a second container covered by a paper towel. Then I just turned the paper towel upside down on a 3rd container and rinsed the shrimp off the paper towel with tap water. Keep your brine water if you don't intend to feed all the shrimp at once, so that you can add the unused shrimp back to the brine and put in the fridge. They say they can live like this for up to 2 days, though mine were dead after 2. All in all this is a great total solution for someone that doesn't want to diy a hatchery. That said, you can do this same thing for a lot cheaper if you do it yourself and its not complicated at all, though as someone who had never done this before, the kit made it really easy to succeed.
I bought this to feed my goldfish fry. Just follow the directions and you'll have lots of baby brine shrimp. One caveat: hand-tightening the bottle to the base may result in a leak. Use some pliers to gently screw down the bottle.
It works better than other brine shrimp Hatchery out in the market.