This Was the best purchase I've ever made! I got the blue and black insulated bottles back in September and my boyfriend and I love them! We do not go anywhere without them including out to eat. After drinking my alkaline water everyday for so long, nothing else compares to the taste and the results I've gotten. My body stays hydrated and it's a noticable difference from when I drink regular water. Also I lost my job at one point and wasn't able to purchase a replacement diffuser for a few weeks after my diffuser needed to be replaced. So my water wasn't alkaline anymore and my body went back to how it used to be before DYLN. My face started randomly breaking out again (I didn't even realize the water was the reason my skin was clear in the first place). I was always super thirsty, and I felt a slight decline in my health. But once I was able to buy a new diffuser the alkaline water fixed me back up within a few days! I learned my lesson and I will always have extra diffusers because I can't live without my alkaline water! Thanks so much DYLN!