It’s a fin on the top, for aerodynamics

I have done my own study and I also found a link between cows milk and autism. They are both on this image. Spooky stuff.

In my experience, we left it in the packaging, and also the taps continued running as that helped speed it along. Strictly in cold water.

This reminds me of that time Kanye West gave that young upcommer Paul McCartney a boost by having him guest on a song.