3D printers have produced some pretty amazing (and scary) stuff, and now a pair of high school seniors have successfully used the tech to ensure they'll never have to eat a soggy hotdog again. Tired of the watery, separated ketchup you get from a bottle that's been sitting unused for a while, the two seniors went about solving the issue with the help of their school's 3D printer. What they ended up with was a replacement cap for bottles that forces the sauce out through an internal, raised tube. As ketchup leaves the bottle at a higher point, the standing water at the cap end stays inside. The simple but elegant fix may seem like a trivial use of 3D printing, but it's the perfect example of rapid prototyping, and the make-it-yourself attitude the technology is all about. There's even talk of the young dudes turning the project into something of a business venture, but if that doesn't work out, there'll almost certainly be scholarship spots for them at the MIT's ketchup vessel innovation department.