The tech. described in TFA sounds like something that would make for an awful bottom coat, since such surfaces tend to promote growth by providing something attachable.
Would be nicer to just point lasers and the existing cans or glass bottles and be done with it.
So I would prefer nanoengineering to manipulate surface tension.
Nanotoxicity is a very poorly understood field and any nanomaterials are at the very least likely to flake away bits that are similar to asbestos.
One is only relevant at hundreds of degrees, so it's a pan problem and not a can/bottle problem.
The other is a separate chemical that's sometimes used in the production, and the solution is simply to not use that chemical.
So not perfect, but pretty good!
If it were that simple then they would already not be using it
Yeah, did you read the link? "several manufacturers have entirely discontinued its use"
But also your statement isn't really true as a general rule. Sometimes it's very straightforward to avoid an ingredient but it costs half a penny extra.