Design with ivory circular knobs, easy to use, healthy materials, and safety. This product has undergone elution testing based on the standards for foods, additives, etc., announced by the Japanese Ministry of Health, Labour and Welfare, and has obtained a certificate of analysis. 【Food Grade Silicone】 The material is made of reinforced glass and food-grade silicone, so it not only has excellent adhesion but also eliminates the worry of rust like iron lids, providing a comfortable user experience. 【Easy Storage】 3-size compatible, combining three into one, saving space and making storage easy. 【Materials & Size】 Reinforced glass, silicone, stainless steel