Made Of Borosilicate Glass And Is Guaranteed To Withstand Temperatures Of Upto 350 Degree Centigrade. Also, Can Be Safely Used In The Microwave, Oven, Fridge, Freezer, And Dishwasher, The Glasses Are Harder And Tougher Than Ordinary GlassUnlike Plastic And Other Soda Lime Glass, The Borosilicate Glasses Will Not Leech Chemicals Into Your Food Even Over Repeated Usage Nor Will It Turn Milky Or Cloudy With Repeated Usage.As A Non-Porous Glass, The Borosilicate Glass Will Not Absorb Stains Or OdorsIt Includes 6 X Bowl 170 Ml EachQuality Guaranteed