Microwavable storage case for easy cleaning. 4 minutes 700 up to 1250w. Caution: Hot stream may escape case when opened. Care: Prior to first use, sanitize by boiling in water, for 5 minutes. For daily cleaning, wash with hot water and mild detergent then rinse clean. Dishwasher-safe (top-rack). Water may get inside the nipple during cleaning and can be removed by squeezing the nipple. For hygiene and safety, replace pacifiers after 2 months of use.