Beep, beep. Each beep from the Baby Chef Freshness Minders by Kidsline serves as a reminder to feed your baby or toss out old formula. You can choose whether you want the 24-hour timer to count up or down. The Freshness Minders come in a set of 3 and are each color-coded so you can differentiate between bottles. Each Freshness Minder comes with a magnet attached to it so you can conveniently place it on your refrigerator. Batteries included.