We were excited for this purchase, however, our daughter spit up after every bottle we made with this machine. This is not her norm at all. We read some other reviews about possible inaccuracy with water to formula ratio and stopped using. We reached out to snuggle bugs to return the machine and purchase a water dispenser instead, since we weren’t using the formula feature. They informed me that I could not return because I had used it, despite it being only 2 weeks since buying it. We obviously did not know the machine was defective until we used it, so this was very surprising that they would not allow it. It also does not say final sale anywhere on product page or I would have been aware before purchasing. If you are interested in trying this machine, I would buy from another retailer who has a more flexible return policy - especially when it comes to safety of the formula an infant is consuming.