... the microwaver, steamer or freezer 2.non-toxic,without mercury 3.durable eco-friendly heat-resisting borosilicate glass baking ... Character: a) Can be used in microwave oven, steamer safely. Disinfected within the boiling water as well. Resistance high temperature ... friendly container: a) environmental-friendly material, non-toxic, without mercury b) harmful substance is excluded, such as lead, cadmium, ...