system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some pots and beakers pour well while others cause liquids to drizzle down the edge, resulting in a mess?
gpt
It's to do with the shape of the lip. If the lip is too smoothly curved between the inside and the outside, the forces that keep water on the surface of the pot/beaker will be enough to overcome the force that pulls the water away from the surface. If you just have a lip that has an abrupt edge rather than a smooth curve, it will be much harder to make it drizzle and much easier to pour.