11-29-2017, 01:40 PM
"as anyone ever tried taking balloons or big zip lock bags* of low elevation air up to Mauna Kea..."
Not a product endorsement (never tried it) but I ran across this:
https://www.amazon.com/Boost-Oxygen-Natural-Small-Green/dp/B005LZSWU4/ref=as_li_ss_tl?ie=UTF8&qid=1512013103&sr=8-4&keywords=canned+oxygen&linkCode=ll1&tag=cd023-20&linkId=aec8869e85c12f98c89a6bede0df8959
Not a product endorsement (never tried it) but I ran across this:
https://www.amazon.com/Boost-Oxygen-Natural-Small-Green/dp/B005LZSWU4/ref=as_li_ss_tl?ie=UTF8&qid=1512013103&sr=8-4&keywords=canned+oxygen&linkCode=ll1&tag=cd023-20&linkId=aec8869e85c12f98c89a6bede0df8959