This set of 2 graduated beaker rocks glasses each feature a prominent "Wh" periodic table square, for one of the most powerful elements known to science - WHISKEY Glasses feature calibration marks in milliliters allowing you to pour a precise volume of your desired alcohol - 400ml mark designates a 14oz pour, max capacity 18oz Lab-grade borosilicate glass is oven, microwave, fridge, and freezer safe - Drink Periodically glassware is the real deal A perfect gift for the STEM aficionados in your life - medical pros, teachers, and science enthusiasts of all stripes can appreciate this clever conversation starter, for use or decoration Drink Periodically offers the original and the best novelty periodic table drinkware, in a variety of styles and sizes - wine glasses, beakers, and laboratory flasks with unique element tab Size-400ml/14oz