I tried the light blue can instead of the dark blue... But in my experience this drink was quite effective. I'm someone who has always had issues with insomnia and even sleeping pills struggle to put me down a lot of the time. But this product, if I prepped myself by doing a quiet bedtime routine, did help me to fall asleep and stay asleep. The taste was actually very good. Kind of like a watered down version of something else but I enjoyed it. I like that it's natural and safe and if you only need half/part of the can you can simply put the rest in the fridge for later and it's fine. For the price I won't be purchasing more, but it was interesting to try.