I usually bring a cup of fruit with yogurt from home to my work. I dont want it to leak inside my purse, so I used to use ziploc screw top 8oz plastic containers. It was wide mouth shallow container, so if I try to keep it upright, it creates bulge in my bag. It also has ridges inside so it was not easy to scoop out all of the contents. (especially yogurt!) So I like how these cups are tall and slim. They can stay upright in my bag neatly. The lid and cup have no unnecessary bumps or ridges so it is super easy to use (I can scoop out yogurt very easily) and easy to clean. Ive been using these for 10 days so far, no leak happened. Great buy. The colors are fun too.Review update: Although the sides of the cup are smooth, the square bottom shape does not allow a regular stainless steel spoon to scoop out every last bits of food.