Beakers in PYREX® borosilicate glass are available in several styles. PYREX® Heavy Duty Graduated Griffin glass Beakers are specifically designed to offer the best mechanical strength under harsh conditions, such as mechanized washing operations. For convenience, the 250 through 4L beakers have a double graduated metric scale to indicate their approximate content. Large Volume plastic beakers are manufactured of autoclavable polypropylene and are available in 5 Liter and 10 Liter sizes. They feature flared rims and spouts for safe transfer of large amounts of liquid.