Sturdy, not easy to break - the vinegar/ oil dispenser bottle are made of 3 mm thick borosilicate glass. sturdy, not easy to break. can withstand instantaneous temperature difference from -20 degrees to 150 degrees c (-4 to 302 degrees fahrenheit) oil control scale, anti-drip design - we print the clearly scale line on the oil dispenser body, that can help you to control the amount of u want to pour bamboo cork stopper included for convenient oil storage.