At the risk of stating the obvious, lots of cool things come out of MIT.
The secret is in a futuristic substance known as "LiquiGlide," a non-toxic, FDA-approved coating that can be applied to the interior of bottles. According to MIT PhD candidate Dave Smith, it's "kind of a structured liquid — it's rigid like a solid, but it's lubricated like a liquid." Regardless of what the bottle is constructed of, liquid or plastic, ketchup will flow out of it nearly effortlessly.
Interestingly enough, LiquiGlide wasn't initially designed to be used for ketchup — the original idea had the coating being used as an anti-icing coating, or a pipe coating that might help reduce oil and gas clogs. But as Smith explains, "most of these other applications have a much longer time to market; we realized we could make this coating for bottles that is pretty much ready. I mean, it is ready."