[falsaberN1]

Makes perfect sense, in nature you have a lot of both practical and odd functionality out of filling "bags" with air or liquid.

This is a pretty cool approach. If they can improve the visual presentation it can also look pretty awesome. Gives me some inspiration for drawing scifi designs too.

[chocrates]

Liquid seems like a better approach from an engineering standpoint because it is non compressible. But then I imagine dealing with liquid is more of a pain than air.