The Lyne Dual Cage Adpater allows you to mount two bottles on to your frame.
Note: this will only work on a Holy Rail and can't be used on it's own. This will only work with certain frames with enough clearance. You may need to run smaller bottles on smaller size frames. Certain frames may not work at all due to size constraints.
Check out our Holy Rail archive, we are documenting successful Holy Rail setups for reference purposes.