You know what a pen cap is for. You know what jean pockets are for. But there are so many different uses for every day objects we didn't even know existed! We accept them as normal and never ask questions.
These are some things that have every day uses you probably didn't even know about.
1. Fuel Gauges
No, it's not just for telling you how far until empty. Fuel gauges have a tiny arrow next to the gas pump, which indicated which side of the car your gas cap is on.
2. Bread Tags
The colors of bread tags are organized to let you know which day of the week each loaf was delivered to the store. The colors go in alphabetical order: blue, green, red, white, yellow. They each correspond to the days of the week.
3. Jean Pockets
The small, seemingly useless pocket on your jeans isn't useless at all: it's for your pocket watch! More accurately, it was for peoples' pocket watches in the 1800s, when they were much more popular. Now, most people use them for spare change.
Your aluminium box also has a hidden use!