Although I rinsed it with water, I have stored it without ever putting formula in it. Since it has been stored at home, please refrain from purchasing if you are concerned. The box is large, so it may be sent with minimal packaging. This is a formula maker that instantly creates warm milk automatically and has 3 temperature settings. - Brand: babybrezza - Model Name: Formula Pro Advanced - Function: Instantly creates warm milk automatically - Temperature Settings: 3 temperature settings - Dispensing: Dispenses in 1-ounce increments - Compatibility: Compatible with all major formula brands and bottles Thank you for viewing.