If afraid of wind, maybe sticky tape should help (scotch tape). Or heck staple it in place
I use plastic cups on my pot and they do get blow away in strong winds
Casey, you mean that the material does not crumble easily from UV light? This is basically "Acetate" right? The one used for printing out to show on overhead projector? Cool idea. Allows for air flow at the side to boot.
Will work for Nepenthes seedlings as well I am sure.
TTFN
Arvin