Perfect for small quantities. The ideal size for making mayonnaise with one egg or egg-white from 1 to 2 eggs. With the close fititng snap-on lid you can store your mayonnaise for weeks in the fridge. Ideally suited for storing food. The beaker is made of Polycarbonate which is break, shock and heat resistant up to 150 degrees Celsius, suitable for use in freezers and microwave ovens, non-toxic and dishwasher proof.