Teat: Anatomical natural rubber teat 100% BPA, PVC and phthalate free Made in Denmark. Complies with strict EN1400 regulations. The manufacturer recommends changing the pacifier every 6 weeks Does not include a protective cover. We never recommend sterilizing in the microwave. And in this case, as it is a PP pacifier and its assembly is made with the same natural rubber as the teat, high temperatures can cause the pacifier to fall apart. We recommend that you heat a pan of water, remove it from the heat and place the pacifier in it for 2 to 5 minutes.