It's a question that has puzzled mankind for years - how do you get every drop of sauce out of the bottle?
Anyone who has ever tried to finish off the remnants of a bottle of tomato ketchup will be familiar with the difficulties involved in extracting every last little drop of sauce.
Now though, scientists at the Massachusetts Institute of Technology (MIT) believe that they have finally developed a solution to this age-old problem in the form of a new type of bottle coating.
Going by the name Liquiglide, this new liquid-solid coating makes it possible for every last drop of sauce to make its way out of the bottle without any of it getting stuck to the sides.
"The cool thing about it is that because the coating is a composite of solid and liquid, it can be tailored to the product," said Professor Kripa Varanasi, one of the scientists who developed it.
"So for food, we make the coating out of food-based materials and so you can actually eat it."