The Egg Bubble Piercer is a simple yet effective kitchen tool designed to prevent eggs from cracking during boiling. This small device features a sharp, needle point that gently pierces the air bubble inside the egg. By doing so, it allows air to escape, reducing internal pressure and minimizing the risk of the shell breaking while cooking. The Egg Bubble Piercer is easy to use: just tap it gently on blunt side of an egg to create a tiny hole in the eggshell. It's a must-have tool for perfect, crack-free boiled eggs every time.
 

To build such a device you will need generic 26mm long Dressmaker pin just like those:
 

Simply insert one of them in hole of the device and secure it in place with screw on cap.

If you are interested in topic of perfect soft boiled eggs check out this article.
 

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