Holes in Airplane Windows
If you travel enough, you'll learn all about the unique quirks on airplanes. If you look closely, all airplane windows have small holes in them. That's so the cabin pressure can always be regulated.
The Neck on Soda and Beer Bottles
Did you know that gripping a bottle around its neck is actually more secure than holding it around the body? The problem with holding the bottle around the body is that the heat from your hand quickly transfers to the drink. That's not the case if you hold it by the neck.