Usage: Insert the Me Luna® menstrual cup into the collapsible cup and fill it with water. Do not place the lid on the cup. Put the cup in the microwave oven and select the necessary time for the water to boil. Time may vary depending on the oven's power settings. The cup becomes very hot after heating, so handle with proper safety precautions and use oven gloves. Seal the lid over the cup and let the content cool. Menstrual Cup