Because "We're always doing scientific reserch here at the Wine Watch" especially with older wines, you should always decanter your wines and not only reds! This unique decanter we've adopted had exceptional strength and stability. Brilliant transparency. Superior resistance to drastic changes in temperature. These are among the key properties that enable Pyrex® glass to endure even the toughest wine environments, making it the indispensable partner for education and research of wine for over 100 years. Narrow mouth with heavy tooled rim. White enamel graduations are approximate. 2,000 mL.