Printed onto its surface so we know where we are all the time and can see how big things are.

Anyone else hate wasting soap? There's always that small piece that falls out of your hands.. I try sticking it to the new bar but it always comes loose.

Soap makers could reduce the weight of/improve margins of the soap by 5% and consumers would finally be able use up this small piece that always melts down the drain anyways.

...and then hitting the front page because Reddit wants to see it happen

The feature cannot be turned off once installed, of course.