oion 5 This cup is lightweight with a thin lip for easy drinking. The handle is wide and comfortable to hold. Keep in mind that the true practical capacity is about 240 ml/8 oz when filled to the curvature inside the cup. I bought this to heat hot cocoa in the microwave and to keep the hot cocoa warm for a slightly longer time, but I didn't want glass. The thermal insulation is definitely not as good as a steel vacuum tumbler, so keep your expectations reasonable, especially because there is no lid. If the cup was about 100 ml larger, it would be my perfect mug, but it is still an excellent product.Update: I have now used this in hot weather and am happy to report that the cup works well (no sweat).