OK here's the report:
I have not noticed anything w/the bag inflating, but I was very surprised when we landed in Albuquerque, there was no doubt that my waffle cushion had inflated significantly! I've been carrying it around for months and it was just obviously bigger, enough so that my family could tell too, just from looking at it.
My partner's nephew said that they used to like to take full balloons on car rides up higher in the mountain -- at some point they pop. I want to try that too.
I am digging out my chemistry, remembering pv = nrt..... so if the pressure goes down, volume goes up ..... but that's for gasses, and I don't have that much gas in the bag, it's mostly liquid..... so I am agreeing w/Jimmy.
As for the ziploc bag, if it started w/air in it, than it's like the balloon, so it should expand some, but if you take the air out first, shouldn't matter.
Hope my waffle cushion doesn't pop when I get higher up!
Anyways, I'm having a great time, it's so gorgeous here. We walked by the pedialyte at the store yesterday and I was just so happy -- that was my beverage of choice last year on the trip, and I hope I never drink it again! (I have some issues w/gatorade). Going to Mesa Verde today, my partner grew up a few miles away, but in the last three years, I have been too fatigued to actually go. It is so fabulous being healthier!
I don't have time to read other posts now, but I wanted to share this interesting info.... will catch up when I get home. Hope you're all well.
48 years old, female.
2004 dx indeterminate colitis. Back and forth between Crohn's and UC dx. Many drugs, minimal success.
2010-11 Crazy skin and eye complications, high fevers, bad flaring. Out of good drug options, tired of scary drugs.
Feb 2011 -- proctocolectomy with permanent ileolostomy; abscess, blood clot. Still healing, still glad for the surgery