Another idea

Hey everyone. I was playing with my water bottle the other day, and i unknowingly was making an indentation in the top of the bottle with my thumb. I realized that i do this by the way i hold the bottle (letting it more hang from my thumb and middle finger than actually hold it. Then i thought "hey, putting a dent or groove in the bottle to begin with might be a good idea" . So ya, and constructive criticism or any form of criticism for that matter is greatly appreciated.