You want a soup mug.
A glass is awkwardly shaped to dip a spoon into. You generally don't want to drink your soup from the start, because it's full of chunky stuff and it's very hot; eating with a spoon lets you cool it as you eat it and is better for eating the chunky stuff. This also makes speed a non-factor; you don't want to be trying to chug down hot, chunky soup.