This set of 2 round bowls is made of high-quality borosilicate glass. Important: When removing the bowl from fridge or freezer, do not introduce it in a pre-heated oven at more than 120°C. It is reusable and easy to use. Capacity / Size / Weight: 800ml / 15 x 8.1cm / 500g; 2,700ml / 23 x 11cm / 1,250g.