Yes. If you follow the manual and handle your menstrual cup according to our instructions, then it is safe to use. Our Flow Cups are made from 100% medical-grade silicone. The silicone is 100% hypoallergenic, 100% latex-free, 100% fragrance-free and 100% free from artificial colours. The silicone we selected for FlowCup has also been tested, with favourable results, in accordance with USP Class VI protocols. Furthermore, our menstrual cups are manufactured under especially hygienic conditions where other medical components are manufactured, and the conditions we impose on the factory are extremely stringent. The United States’ equivalent to our National Food Agency is called the FDA, and they recommend replacing a menstrual cup every three years. We have chosen to follow the FDA’s recommendations.