... ,heat-resistant to 120,sterilizable. Bottle sleeve: without handle ,match with twist cap,polypropylene,heat-resistant to 120. Features: (1),safe silicone ... use. Preservation method: Away from the fire source ,avoid contact with sharp objects. Caution: (1): Sterilize before using boiling water and ... of your baby. (2): Please don't spin the twist cap too tight or too loose to prevent leakage of milk ...