Nordic Ware Storage Bowl Plastic Heatproof 0.7L (Ø13cm) The Nordic Ware Storage Bowl Plastic Heatproof 0.7L (Ø13cm) has a handy size. This batter bowl is made of plastic and suitable for microwaving. Please note! The bowl is NOT suitable for the oven. What it is ideal for, however, is for melting butter and chocolate or heating up milk. Of course, you can also mix batter or sauces in this bowl. The batter bowl has a capacity of 0.7 litres and a diameter of about 13 centimetres.