Every wondered what the bump on the end of your laptop charger is for?
What about the blue end of the two-sided erasers which we used as kids, which was supposed to erase ink but which never did?
Here are a few other things which we use daily which have features you’ve probably wondered about.
1. Glass Bottle Indents
We take for granted the indent on the bottom of glass bottles without wondering what it’s there for. The truth is – it helps to keep liquids which are under pressure from exploding – the more pressure the liquid is under, the deeper the indent in the bottle must be.
