Being made with the best refined soda lime glass these containers are perfect match for food storage and consumption. The container s excellent hardness and durability when compared to general glass and has an absolute air tight function which retains liquid moisture and aroma within it. Moreover the containers are thermal shock resistant upto 135 degree Celsius i.e. one can directly switch the containers from freezer to microwave and vice-a-versa. The container is Scratch resistant and Non porous i.e. will not absorb stains or Odours.