I love these cups! My husband and I are coffee enthusiasts. We purchased a Behmor 1600+ roaster a few years ago, and have pretty much an entire side of the kitchen dedicated to coffee related items. The double walled glass is perfect for seeing the color variance in water to coffee ratios, as well as different roasts and varieties. These cups are also perfect for cold drinks since they do not sweat. Highly recommend and am thinking about the entire line at this point.