"Grade silicone" refers to a specific quality or type of silicone material that meets certain standards or specifications. It is often used to indicate that the silicone is high-quality, safe, and suitable for specific uses or industries.
This baby bottle is made of medical grade silicone components hence it is 100 % safe for baby to use. (babieslounge.com)
This baby bottles comes with medical and food grade silicone made nipples with advanced design. (babieslounge.com)
In addition, the nipple and body is completely made out of 100 % medical grade silicone making them as close to perfection as a bottle can get. (mymilkybaby.com)