I like the idea.
How the material lasts under the grow room light or even outside sun, will be the factor that determines if they are reusable. Stuff gets brittle and crumbles after being in the sun for extended periods.
Id test out a few on 3-5 gallon air pots for you.
As a small hobby grower,
I’d buy 12 to start.
Depending on price.
cheap to me is $5-6 each for a 3-5 gallon
Expensive $10-12 in my mind.
But I have no clue.
Just throwing it out there for you.