Torhans Aero 20. 22oz water bottle. I just upgraded to this from the clunker of my profile design bottle. Carrying 2 bottles on the back of my tri bike means I was comfortable sizing down to this smaller bottle up front.
"Impossible is just a big word thrown around by small men who find it easier to live the world they've been given than to explore the power they have to change it. Impossible is not a fact. It's an opinion. Impossible is not a declaration. It's a dare. Impossible is potential. Impossible is temporary. Impossible is nothing." -Muhammad Ali