How do aquafresh stripes other come out watertight?

How do aquafresh stripes other come out watertight?
The different colors are actually within seperate compartments within the tube. If you cut unstop an empty pack, you will see separators keeping them apart. The dividers stop near where on earth the cap comes out, and you attain stripes.
It's the way the factory owner puts them in the tubes as they kind them. They don't stick to each other.
Blessed Be
-Obsidian
I'm guessing they hold different types of formula, like grease and water, but I could be completely wrong :)
But it is slightly amazing how they do always come out reliable.