Can Be Chewed in All Angles: It is made by 1 piece injection mold of BPA free food grade silicone. Babies are safe to chew on every part of the products. A Gum Massager and A Silicone Toothbrush: The textures on the head can massage the gum for teething pain relief and can clean the tongue. Easy To Grasp: Hollow body design is easy for baby to hold. For 4month babies, they hold things and directly head to mouth, the textured part is right on the middle of the product, can be headed easily to mouth. Non-Choking Design: It is designed to make sure it can not be put too back to the mouth to cause gag. Dishwasher and Freezer safe: Can be washed with bottles, pacifiers and other accessories. Cen be put in freezer to get extra soothing experience.