BabySafe USA Flow By HiSense microwave Sterilizer: Jason Perry, General Manager, BabySafe USA, here to tell you about our Flow by HiSense line of products. This is our microwave sterilizer, BPA free. Put your bottles, nipples, caps, rings, inside- 7 ounces of water-into the microwave. Keeps your bottles and everything sterilized for 24 hours.