Even if it's not exactly the intended method, the sideways squeeze is a fun party trick you can use — so long as the ketchup bottle is still full enough to have sufficient air pressure inside.

The frustration of whacking the bottom of the ketchup bottle to get those last precious drops - only to have your plate flooded by the red stuff - will soon be a thing of the past. Bottles coated ...

Slapping your ketchup bottle will be a thing of the past Credit: Photo: ALAMY We've all been there, furiously shaking and slapping a ketchup bottle in a futile attempt to get those last few ...