Review on ☕ 2-Pack Espresso Measuring Glass: 3-Ounce Double Spouts Shot Glass with Pouring Handle - Barista Measuring Pitcher: Heat Resistant Milk Cup by Brandi Shatwell

I use one of these under a dual spout espresso portafilter. This gives me a volumetric measure of the size of an espresso shot. I find that they work very well. I doubt the markers will survive a cycle in the dishwasher, so we hand wash them. (The markers on the previous set from another manufacturer were dishwasher safe for 2 cycles.) They are made of thinner glass than the other set I had. I prefer them because they don't chill the shot as much as heavier glass.