Heats breast milk or formula to 98.6 degrees every time and will hold it at this temperature for 15 minutes No confusing water tanks or measurements needed Leak proof: Screw bottle directly into unit, or utilize enclosed adapters for a secure fit Small base for clutter-free countertop Includes 4 adapters Fits most major bottle brands including Dr. Brown's Original, Avent, Medela, Tommee Tippee, Comotomo and others*