Redshift Water Bottle Mount for Quick-Release Aerobars Between-the-arms (BTA) location is the most aerodynamic place to store a water bottle. Seamless one-bolt integration with Redshift's Quick-Release Aerobars - say goodbye to zip ties and duct tape. Easily removes and attaches along with the aerobars. Keeps your hydration at your fingertips - drink without even leaving the aero position. Includes water bottle cage.