Thanks for everyone who has responded so far. I'll keep holding out for 1.3cu bottles as I'm not in a hurry. Tho it makes sense when I say I have to carry this on my person when I fly, you can imagine a "big" bottle is not conducive when wearing a 5point seat belts (think auto-racing for comparison) and sitting in a tight cockpit (think current airline seats)......
Thanks to Johnoly for pointing to ebay etc - I figured Id start here first.
Thanks to Johnoly for pointing to ebay etc - I figured Id start here first.