You’re talking about an absolute game-changer for Sunday breakfast: the eggshell cracker (often simply called an “egg topper” or “clack”)!

Anyone who’s ever tried to crack open a perfectly soft-boiled egg with a knife knows the struggle: either the shell shatters into tiny pieces, or the runny yolk spills uncontrollably over the edge of the plate.

This ingeniously simple kitchen gadget revolutionizes the whole process with pure physics—and it’s even fun to use.

How does this wonder work?

The gadget looks like a small metal cap with a rod and a heavy metal ball on top.

Place: Place the metal cap on the pointed end of the cooked egg.

Pull: Pull the metal ball upwards along the guide rod.

Release: Simply release the ball. The impact of the ball creates a precise shock wave that is transmitted to the edge of the cap. The result: The eggshell gets a clean, circular crack (the eponymous break point).

Afterward, you can simply lift off the “egg cap” with a knife or your fingers – without any splinters or mess. The yolk remains perfectly protected in the lower part of the egg.

2 more underrated gadgets for egg lovers
If you thought the egg topper was all there was to it, there are two more little helpers that belong in every kitchen:

The PiepEi (the egg timer that cooks with your eggs): You store this plastic egg with your real eggs and drop it into the boiling water. It measures the water temperature and plays a specific melody (e.g., “Killing Me Softly” for soft-boiled eggs) when the perfect level of doneness is reached. Perfect, regardless of whether the water was already boiling or not.

The egg piercer: A tiny tool from great-grandmother’s time, often forgotten today. A small prick in the blunt end of the egg releases the air bubble and almost always prevents the egg from cracking in boiling water.

Have you tried this eggshell-breaking device yourself, or have you come across another fascinating egg gadget?