The BTA HSF800 plus system has a bottle that has been designed to hide the cage from the wind. We worked to minimise frontal area wherever possible to avoid adding aero drag to your setupThe plus system adds premium features - a flexible hose with a bite valve and magnetic retention clip for when the going gets toughThe system features a Garmin mount on the cage above the bottle for easy viewing,The revised and new mounting bracket offers greater compatibility than previous models,Redesigned cage has a high retention design,Bottle unscrews at the middle to make for easy cleaning,Easy to open secure fill port lid to avoid any sports drink splashing over bike or rider,800ml capacity.Please watch the cleaning and assembly video before purchasing>