Go on, have a guess.
Most people would say something like "the wheel" or "fire" even though fire is not an actual invention. But those idiots would be wrong.
The under 25's are more likely to say "Like....a i-phone?" in that idiot way that youths do and they would be wrong on many levels. Firstly because it should be said "AN I-phone (tm)" and there is no need to begin a sentence with the word "like" stupid idiots.....
On top of this, their answer is still incorrect.
The true answer to the question "What is the greatest invention ever?" is.......
The humble teabag.
That's right, the teabag.
Just think how clever the little bag of tea is.
Here we have a tiny little parcel of super thin paper that can withstand boiling hot water whilst being battered, jabbed and squeezed by a metal spoon.
It can do this whilst still being able to diffuse the flavour of the leaves inside through small perforations that sit across it's surface.
If I (or anybody else) were to throw you in a pot of boiling water and attack you viciously with a sharp edge metal spoon, you would be well within your rights to complain and say "ow, stop it. That smarts!"
The heroic tea bag,in it's many shapes and sizes and flavours, just takes it all in it's stride.
It very rarely fails in doing its job perfectly as well.
It has been many a full moon since I last heard a tale of a split teabag.
And so Ladies and Gents, We should all bow down to the creator of the mighty Tea bag and give it some credit for giving us great cups of tea for 111 years.
So, next time you are having a cuppa, please raise your mug or cup to Mr Thomas Sullivan, the man who gave the world it's greatest invention.
Thank You Mr Sullivan.