For sale is a 250 ml BOROSIL ROUND BOTTOM BOILING FLASK. Round bottom flasks are ideal for heating, boiling, and evaporating liquids. The round bottom provides uniform heating. This durable laboratory glassware is made from durable borosilicate glass. Flask stands about 6 inches tall. Makes for an unusual flower vase or display as part of your made scientist themed décor. Buy it to channel your inner Walter White.