This should be awarded a Nobel Prize or be selected as the Best Invention of the Century! https://www.youtube.com/watch?feature=player_embedded&v=7JTuEUSauc0 And they're high school students! Read more @ http://www.popsci.com/article/diy/high-school-age-heroes-create-ketchup-lid-doesnt-squirt-water
LOL, pretty cool. I solved this years ago by shaking the bottle left and right, or even up and down, to re-mix the ingredients better. Didn't cost a dime! haha