We have 2 children, a 6 year old and a now 4 month old. All you moms know how hard it is to be on the go and have to mix a bottle. I can't tell you how many times I was trying to make a bottle in the car and spilt it everywhere. When I found these, I got so excited it was like I hit the lottery. Now I ALWAYS keep these on deck. They are so convienent and so easy! My son has used this kind of formula since day 1 and he has done extremely well on it. I couldn't love it anymore than I do, well that's what I thought until I found these premade disposable bottles!!! I highly recommend these. They are a life saver!!!!!