Hello Richard, Thank you for your inquiry! For Air Travel, the Zeagle Pony Bottle System will need to be drained of air. After draining, the 1st Stage/2nd Stage asssembly must be unscrewed from the tank. This procedure is requireed by all airlines. The Zeagle Pony Bottle System’s holster is primarily set up to be mounted to a Zeagle BCD. The Zeagle Holster does have grommets which can be line up with the BCD “D” Rings with the use of some small carabineers.
http://www.scuba.com/scuba-gear-98/030487/Scuba-Dive-Carabiner-with-Ring.html If you find the Zeagle Pony Bottle System not meeting your needs, you can return it “Un-USED”, with all of its original packaging to us for a refund on the item only. Please call us if you wish to return the item.
http://www.scuba.com/scuba-gear-33/043117/Zeagle-Pony-Bottle-System.html If you have any questions or wish to place an order, please call us at 1-800-247-2822 or 949-221-9300.
FULL MANUFACTURER'S WARRANTY
Zeagle pony bottel system 
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