High quality Porcelain Easily wipe clean the inside Designed to evaporate excess solvents to produce a concentrated solution or a precipitate. Easy pour spouts on all models Designed for use in the laboratory, but can be used in the home as well -- or even in a set for "potions". Evaporating basin designed to evaporate excess solvents to produce a concentrated solution or a precipitate. Available in other sizes and both porcelain and borosilicate glass.