Simple - great product - this product has remained it's superior quality it has had for decades!  The glass is still as thick & durable as my first purchase of product over 25 years ago = that is RARE!  For this reasonable price - do you & your family a great service   PLEASE do not heat your food in plastic.     plus ordering from Wayfair we all get GREAT Service. FAST shipping & ALL the quality we KNOW will come from Wayfair!  
Patti Kojis